Publications

@article{Park2024,

title = {White matter microstructural integrity as a key to effective propagation of gamma entrainment in humans},

author = {Yeseung Park and Euisuk Yoon and Jieun Park and Jun Sung Kim and Ji Won Han and Jong Bin Bae and Sang-Su Kim and Do-Won Kim and Se Joon Woo and Jaehyeok Park and Wheesung Lee and Seunghyup Yoo and Ki Woong Kim},

doi = {10.1007/s11357-024-01281-2},

issn = {2509-2723},

year  = {2025},

date = {2025-02-00},

journal = {GeroScience},

volume = {47},

number = {1},

pages = {1019--1037},

publisher = {Springer Science and Business Media LLC},

abstract = {Abstract

          Gamma entrainment through sensory stimulation has the potential to reduce the pathology of Alzheimer’s disease in mouse models. However, clinical trials in Alzheimer’s disease (AD) patients have yielded inconsistent results, necessitating further investigation. This single-center pre-post intervention study aims to explore the influence of white matter microstructural integrity on gamma rhythm propagation from the visual cortex to AD-affected regions in 31 cognitively normal volunteers aged ≥ 65. Gamma rhythm propagation induced by optimal FLS was measured. Diffusion tensor imaging was employed to assess the integrity of white matter tracts of interest. After excluding 5 participants with a deficit in steady-state visually evoked potentials, 26 participants were included in the final analysis. In the linear regression analyses, gamma entrainment was identified as a significant predictor of gamma propagation (p < 0.001). Furthermore, the study identified white matter microstructural integrity as a significant predictor of gamma propagation by flickering light stimulation (p < 0.05), which was specific to tracts that connect occipital and temporal or frontal regions. These findings indicate that, despite robust entrainment of gamma rhythms in the visual cortex, their propagation to other regions may be impaired if the microstructural integrity of the white matter tracts connecting the visual cortex to other areas is compromised. Consequently, our findings have expanded our understanding of the prerequisites for effective gamma entrainment and suggest that future clinical trials utilizing visual stimulation for gamma entrainment should consider white matter tract microstructural integrity for candidate selection and outcome analysis.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Seok2025,

title = {Toward Objectification of Subjective Chronic Pain Based on Implicit Response in Biosignals},

author = {Hyeon Seok Seok and Sang Su Kim and Do-Won Kim and Hangsik Shin},

doi = {10.1109/tbme.2024.3452708},

issn = {1558-2531},

year  = {2025},

date = {2025-01-00},

journal = {IEEE Trans. Biomed. Eng.},

volume = {72},

number = {1},

pages = {337--345},

publisher = {Institute of Electrical and Electronics Engineers (IEEE)},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Lee2024,

title = {Effect of dynamic binaural beats on sleep quality: a proof-of-concept study with questionnaire and biosignals},

author = {Hwa-Ah-Ni Lee and Woo-Jin Lee and Seong-Uk Kim and Hyunji Kim and Minkyu Ahn and Jeonghui Kim and Do-Won Kim and Chang-Ho Yun and Han-Jeong Hwang},

doi = {10.1093/sleep/zsae097},

issn = {1550-9109},

year  = {2024},

date = {2024-10-11},

urldate = {2024-10-11},

journal = {Sleep},

volume = {47},

number = {10},

publisher = {Oxford University Press (OUP)},

abstract = {<jats:title>Abstract</jats:title>

               <jats:p>Binaural beat (BB) has been investigated as a potential modality to enhance sleep quality. In this study, we introduce a new form of BB, referred to as dynamic BB (DBB), which incorporates dynamically changing carrier frequency differences between the left and right ears. Specifically, the carrier frequency of the right ear varied between 100 and 103 Hz over a period, while the left ear remained fixed at 100 Hz, yielding a frequency difference range of 0 to 3 Hz. The objective of this study was to examine the effect of DBB on sleep quality. Ten healthy participants were included in a cross-over design, where they experienced both DBB and a SHAM (absence of sound) condition across two consecutive nights, with polysomnography evaluation. DBB was administrated during pre-sleep initiation, sleep onset, and transition from rapid eye movement (REM) to non-REM stage. DBB significantly reduced sleep latency compared to the SHAM condition. Electrocardiogram analysis revealed that exposure to DBB led to diminished heart rate variability during the pre-sleep initiation and sleep onset periods, accompanied by a decrease in low-frequency power of heart rate during the sleep onset period. DBB might be effective in improving sleep quality, suggesting its possible application in insomnia treatments.</jats:p>},

note = {<b>Note!</b>},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Gupta2023,

title = {Predictive Breast Cancer Statistical Modelling for Early Diagnosis},

author = {Amit Kumar Gupta and Ankit Verma and Vipin Kumar and Nikhil Kumar and Do-Won Kim and Young-Jin Jung and Mangal Sain},

doi = {10.4283/jmag.2023.28.4.530},

issn = {2233-6656},

year  = {2023},

date = {2023-12-31},

urldate = {2023-12-31},

journal = {JMAG},

volume = {28},

number = {4},

pages = {530--543},

publisher = {The Korean Magnetics Society},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Boo2023,

title = {Altered prefrontal beta oscillatory activity during removal of information from working memory in obsessive-compulsive disorder},

author = {Young Jun Boo and Do-Won Kim and Jin Young Park and Bong Soo Kim and Jin Woo Chang and Jee In Kang and Se Joo Kim},

doi = {10.1186/s12888-023-05149-1},

issn = {1471-244X},

year  = {2023},

date = {2023-12-00},

journal = {BMC Psychiatry},

volume = {23},

number = {1},

publisher = {Springer Science and Business Media LLC},

abstract = {Abstract

                Background

                Obsessive-compulsive disorder (OCD) is related to working memory impairment. Since patients with OCD have difficulty controlling their obsessive thoughts, removal of irrelevant information might be important in the pathophysiology of OCD. However, little is known about brain activity during the removal of information from working memory in patients with OCD. Our goal was to explore potential deficits in inhibitory function related to working memory processes in patients with OCD.

              

                Methods

                Sixteen OCD patients and 20 healthy controls (HCs) were recruited. We compared in prefrontal alpha and beta band activity derived from magnetoencephalography (MEG) between patients with OCD and HCs during multiple phases of information processing associated with working memory, especially in post-trial period of the visuospatial working memory task (the delayed matching-to‐sample task), which is presumed to be related to the information removal process of working memory.

              

                Results

                Prefrontal post-trial beta power change (presumed to occur at high levels during the post-trial period) exhibited significant reductions in patients with OCD compared to HCs. In addition, the post-trial beta power change was negatively correlated with Obsessive-Compulsive Inventory–Revised total scores in patients with OCD.

              

                Conclusions

                These findings suggest that impairment in the removal of information from working memory might be a key mechanism underlying the inability of OCD patients to rid themselves of their obsessions.

              },

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Chang2023,

title = {Evaluation of changes in neural oscillation after bilateral capsulotomy in treatment refractory obsessive-compulsive disorder using magnetoencephalogram},

author = {Jhin Goo Chang and Do-Won Kim and Hyun Ho Jung and Won Seok Chang and Chan-Hyung Kim and Se Joo Kim and Jin Woo Chang},

doi = {10.1016/j.ajp.2023.103473},

issn = {1876-2018},

year  = {2023},

date = {2023-04-00},

urldate = {2023-04-00},

journal = {Asian Journal of Psychiatry},

volume = {82},

publisher = {Elsevier BV},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Park2022,

title = {Optimal flickering light stimulation for entraining gamma rhythms in older adults},

author = {Yeseung Park and Kanghee Lee and Jaehyeok Park and Jong Bin Bae and Sang-Su Kim and Do-Won Kim and Se Joon Woo and Seunghyup Yoo and Ki Woong Kim},

doi = {10.1038/s41598-022-19464-2},

issn = {2045-2322},

year  = {2022},

date = {2022-12-00},

journal = {Sci Rep},

volume = {12},

number = {1},

publisher = {Springer Science and Business Media LLC},

abstract = {AbstractWith aging, optimal parameters of flickering light stimulation (FLS) for gamma entrainment may change in the eyes and brain. We investigated the optimal FLS parameters for gamma entrainment in 35 cognitively normal old adults by comparing event-related synchronization (ERS) and spectral Granger causality (sGC) of entrained gamma rhythms between different luminance intensities, colors, and flickering frequencies of FLSs. ERS entrained by 700 cd/m2FLS and 32 Hz or 34 Hz FLSs was stronger than that entrained by 400 cd/m2at Pz (p < 0.01) and 38 Hz or 40 Hz FLSs, respectively, at both Pz (p < 0.05) and Fz (p < 0.01). Parieto-occipital-to-frontotemporal connectivities of gamma rhythm entrained by 700 cd/m2FLS and 32 Hz or 34 Hz FLSs were also stronger than those entrained by 400 cd/m2at Pz (p < 0.01) and 38 Hz or 40 Hz FLSs, respectively (p < 0.001). ERS and parieto-occipital-to-frontotemporal connectivities of entrained gamma rhythms did not show significant difference between white and red lights. Adverse effects were comparable between different parameters. In older adults, 700 cd/m2FLS at 32 Hz or 34 Hz can entrain a strong gamma rhythm in the whole brain with tolerable adverse effects.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Shim2022,

title = {Editorial: AI-Based Computer-Aided Diagnosis and Prognosis for Psychiatric Disorders},

author = {Miseon Shim and Do-Won Kim and Seung-Hwan Lee and Han-Jeong Hwang},

doi = {10.3389/fnhum.2022.901525},

issn = {1662-5161},

year  = {2022},

date = {2022-04-18},

urldate = {2022-04-18},

journal = {Front. Hum. Neurosci.},

volume = {16},

publisher = {Frontiers Media SA},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Lee2021b,

title = {Optimal flickering light stimulation for entraining gamma waves in the human brain},

author = {Kanghee Lee and Yeseung Park and Seung Wan Suh and Sang-Su Kim and Do-Won Kim and Jaeho Lee and Jaehyeok Park and Seunghyup Yoo and Ki Woong Kim},

doi = {10.1038/s41598-021-95550-1},

issn = {2045-2322},

year  = {2021},

date = {2021-12-00},

journal = {Sci Rep},

volume = {11},

number = {1},

publisher = {Springer Science and Business Media LLC},

abstract = {AbstractAlthough light flickering at 40 Hz reduced Alzheimer’s disease (AD) pathologies in mice by entraining gamma waves, it failed to reduce cerebral amyloid burden in a study on six patients with AD or mild cognitive impairment. We investigated the optimal color, intensity, and frequency of the flickering light stimulus for entraining gamma waves in young adults. We compared the event-related synchronization (ERS) values of entrained gamma waves between four different light colors (white, red, green, and blue) in the first experiment and four different luminance intensities in the second experiment. In both experiments, we compared the ERS values of entrained gamma waves between 10 different flickering frequencies from 32 to 50 Hz. We also examined the severity of six adverse effects in both experiments. We compared the propagation of gamma waves in the visual cortex to other brain regions between different luminance intensities and flickering frequencies. We found that red light entrained gamma waves most effectively, followed by white light. Lights of higher luminance intensities (700 and 400 cd/m2) entrained stronger gamma waves than those of lower luminance intensities (100 and 10 cd/m2). Lights flickering at 34–38 Hz entrained stronger and more widely spread beyond the visual cortex than those flickering at 40–50 Hz. Light of 700 cd/m2 resulted in more moderate-to-severe adverse effects than those of other luminance intensities. In humans, 400 cd/m2 white light flickering at 34–38 Hz was most optimal for gamma entrainment.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Park2021,

title = {Estimation of Emotional Arousal Changes of a Group of Individuals During Movie Screening Using Steady-State Visual-Evoked Potential},

author = {Seonghun Park and Do-Won Kim and Chang-Hee Han and Chang-Hwan Im},

doi = {10.3389/fninf.2021.731236},

issn = {1662-5196},

year  = {2021},

date = {2021-09-02},

journal = {Front. Neuroinform.},

volume = {15},

publisher = {Frontiers Media SA},

abstract = {Neurocinematics is an emerging discipline in neuroscience, which aims to provide new filmmaking techniques by analyzing the brain activities of a group of audiences. Several neurocinematics studies attempted to track temporal changes in mental states during movie screening; however, it is still needed to develop efficient and robust electroencephalography (EEG) features for tracking brain states precisely over a long period. This study proposes a novel method for estimating emotional arousal changes in a group of individuals during movie screening by employing steady-state visual evoked potential (SSVEP), which is a widely used EEG response elicited by the presentation of periodic visual stimuli. Previous studies have reported that the emotional arousal of each individual modulates the strength of SSVEP responses. Based on this phenomenon, movie clips were superimposed on a background, eliciting an SSVEP response with a specific frequency. Two emotionally arousing movie clips were presented to six healthy male participants, while EEG signals were recorded from the occipital channels. We then investigated whether the movie scenes that elicited higher SSVEP responses coincided well with those rated as the most impressive scenes by 37 viewers in a separate experimental session. Our results showed that the SSVEP response averaged across six participants could accurately predict the overall impressiveness of each movie, evaluated with a much larger group of individuals.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Lee2021,

title = {Neural Oscillation Associated with Contagious Itch in Patients with Atopic Dermatitis},

author = {In-Seon Lee and Kyuseok Kim and Hi-Joon Park and Hyangsook Lee and Won-Mo Jung and Do-Won Kim and Younbyoung Chae},

doi = {10.3390/brainsci11040438},

issn = {2076-3425},

year  = {2021},

date = {2021-04-00},

journal = {Brain Sciences},

volume = {11},

number = {4},

publisher = {MDPI AG},

abstract = {Objective: Itch is an unpleasant sensation associated with an urge to scratch and is a major health care issue associated with atopic dermatitis (AD). Contagious itch, i.e., subjective feelings of itchiness induced by watching others’ scratching behavior, is common in patients with AD. Using electroencephalography, we examined alpha (8–13 Hz) oscillations in sensorimotor areas associated with the desire to scratch in patients with AD. Methods: Thirty-six patients with AD and 34 healthy controls (HCs) participated in this study. They evaluated their itch levels after watching short videos of a model scratching or tapping parts of his body. Neural oscillations were recorded from nine electrodes, including those placed over sensorimotor areas. Time–frequency analysis was used to compare mu rhythm suppression over the sensorimotor areas in response to these videos between patients with AD and HCs. Results: The behavioral test showed that the visual stimuli induced increased feelings of itchiness in patients with AD relative to HCs under the tapping and scratching conditions. The time–frequency analysis revealed that mu rhythm suppression in response to scratching images was significantly prominent in patients with AD, but not in HCs. Conclusion: Patients with AD exhibited increased susceptibility to contagious itch. This phenomenon might be related to enhanced mu rhythm suppression in sensorimotor areas of the brain in these patients. Our findings provide new insight into the neurophysiological basis of itch sensations in patients with AD.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Jang2020,

title = {The Dynamic Properties of a Brain Network During Spatial Working Memory Tasks in College Students With ADHD Traits},

author = {Kyoung-Mi Jang and Myung-Sun Kim and Do-Won Kim},

doi = {10.3389/fnhum.2020.580813},

issn = {1662-5161},

year  = {2020},

date = {2020-09-07},

journal = {Front. Hum. Neurosci.},

volume = {14},

publisher = {Frontiers Media SA},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Kim2019c,

title = {The relationship between auditory evoked potentials and symptoms of attention-deficit/hyperactivity disorder in adult patients with major depressive disorder},

author = {Ji Sun Kim and Do-Won Kim and Young Joon Kwon and Hwa Young Lee and Sungkean Kim and Se Hoon Shim},

doi = {10.1016/j.ijpsycho.2019.06.008},

issn = {0167-8760},

year  = {2019},

date = {2019-08-00},

journal = {International Journal of Psychophysiology},

volume = {142},

pages = {50--56},

publisher = {Elsevier BV},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Kim2019,

title = {Can Anodal Transcranial Direct Current Stimulation Increase Steady-State Visual Evoked Potential Responses?},

author = {Do-Won Kim and Euijin Kim and Chany Lee and Chang-Hwan Im},

doi = {10.3346/jkms.2019.34.e285},

issn = {1598-6357},

year  = {2019},

date = {2019-00-00},

journal = {J Korean Med Sci},

volume = {34},

number = {43},

publisher = {XMLink},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Kim2019e,

title = {Cortical volume and 40-Hz auditory-steady-state responses in patients with schizophrenia and healthy controls},

author = {Sungkean Kim and Seon-Kyeong Jang and Do-Won Kim and Miseon Shim and Yong-Wook Kim and Chang-Hwan Im and Seung-Hwan Lee},

doi = {10.1016/j.nicl.2019.101732},

issn = {2213-1582},

year  = {2019},

date = {2019-00-00},

journal = {NeuroImage: Clinical},

volume = {22},

publisher = {Elsevier BV},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Shin2018c,

title = {Simultaneous acquisition of EEG and NIRS during cognitive tasks for an open access dataset},

author = {Jaeyoung Shin and Alexander von Lühmann and Do-Won Kim and Jan Mehnert and Han-Jeong Hwang and Klaus-Robert Müller},

doi = {10.1038/sdata.2018.3},

issn = {2052-4463},

year  = {2018},

date = {2018-12-18},

journal = {Sci Data},

volume = {5},

number = {1},

publisher = {Springer Science and Business Media LLC},

abstract = {AbstractWe provide an open access multimodal brain-imaging dataset of simultaneous electroencephalography (EEG) and near-infrared spectroscopy (NIRS) recordings. Twenty-six healthy participants performed three cognitive tasks: 1) n-back (0-, 2- and 3-back), 2) discrimination/selection response task (DSR) and 3) word generation (WG) tasks. The data provided includes: 1) measured data, 2) demographic data, and 3) basic analysis results. For n-back (dataset A) and DSR tasks (dataset B), event-related potential (ERP) analysis was performed, and spatiotemporal characteristics and classification results for ‘target’ versus ‘non-target’ (dataset A) and symbol ‘O’ versus symbol ‘X’ (dataset B) are provided. Time-frequency analysis was performed to show the EEG spectral power to differentiate the task-relevant activations. Spatiotemporal characteristics of hemodynamic responses are also shown. For the WG task (dataset C), the EEG spectral power and spatiotemporal characteristics of hemodynamic responses are analyzed, and the potential merit of hybrid EEG-NIRS BCIs was validated with respect to classification accuracy. We expect that the dataset provided will facilitate performance evaluation and comparison of many neuroimaging analysis techniques.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Shin2018,

title = {Improvement of Information Transfer Rates Using a Hybrid EEG-NIRS Brain-Computer Interface with a Short Trial Length: Offline and Pseudo-Online Analyses},

author = {Jaeyoung Shin and Do-Won Kim and Klaus-Robert Müller and Han-Jeong Hwang},

doi = {10.3390/s18061827},

issn = {1424-8220},

year  = {2018},

date = {2018-06-00},

journal = {Sensors},

volume = {18},

number = {6},

publisher = {MDPI AG},

abstract = {Electroencephalography (EEG) and near-infrared spectroscopy (NIRS) are non-invasive neuroimaging methods that record the electrical and metabolic activity of the brain, respectively. Hybrid EEG-NIRS brain-computer interfaces (hBCIs) that use complementary EEG and NIRS information to enhance BCI performance have recently emerged to overcome the limitations of existing unimodal BCIs, such as vulnerability to motion artifacts for EEG-BCI or low temporal resolution for NIRS-BCI. However, with respect to NIRS-BCI, in order to fully induce a task-related brain activation, a relatively long trial length (≥10 s) is selected owing to the inherent hemodynamic delay that lowers the information transfer rate (ITR; bits/min). To alleviate the ITR degradation, we propose a more practical hBCI operated by intuitive mental tasks, such as mental arithmetic (MA) and word chain (WC) tasks, performed within a short trial length (5 s). In addition, the suitability of the WC as a BCI task was assessed, which has so far rarely been used in the BCI field. In this experiment, EEG and NIRS data were simultaneously recorded while participants performed MA and WC tasks without preliminary training and remained relaxed (baseline; BL). Each task was performed for 5 s, which was a shorter time than previous hBCI studies. Subsequently, a classification was performed to discriminate MA-related or WC-related brain activations from BL-related activations. By using hBCI in the offline/pseudo-online analyses, average classification accuracies of 90.0 ± 7.1/85.5 ± 8.1% and 85.8 ± 8.6/79.5 ± 13.4% for MA vs. BL and WC vs. BL, respectively, were achieved. These were significantly higher than those of the unimodal EEG- or NIRS-BCI in most cases. Given the short trial length and improved classification accuracy, the average ITRs were improved by more than 96.6% for MA vs. BL and 87.1% for WC vs. BL, respectively, compared to those reported in previous studies. The suitability of implementing a more practical hBCI based on intuitive mental tasks without preliminary training and with a shorter trial length was validated when compared to previous studies.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Shin2017,

title = {Open Access Dataset for EEG+NIRS Single-Trial Classification},

author = {Jaeyoung Shin and Alexander von Luhmann and Benjamin Blankertz and Do-Won Kim and Jichai Jeong and Han-Jeong Hwang and Klaus-Robert Muller},

doi = {10.1109/tnsre.2016.2628057},

issn = {1558-0210},

year  = {2017},

date = {2017-10-00},

journal = {IEEE Trans. Neural Syst. Rehabil. Eng.},

volume = {25},

number = {10},

pages = {1735--1745},

publisher = {Institute of Electrical and Electronics Engineers (IEEE)},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Kim2017,

title = {Estimation of Symptom Severity Scores for Patients with Schizophrenia Using ERP Source Activations during a Facial Affect Discrimination Task},

author = {Do-Won Kim and Seung-Hwan Lee and Miseon Shim and Chang-Hwan Im},

doi = {10.3389/fnins.2017.00436},

issn = {1662-453X},

year  = {2017},

date = {2017-08-03},

journal = {Front. Neurosci.},

volume = {11},

publisher = {Frontiers Media SA},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Kim2017b,

title = {Brain Areas Responsible for Vigilance: An EEG Source Imaging Study},

author = {Jung-Hoon Kim and Do-Won Kim and Chang-Hwan Im},

doi = {10.1007/s10548-016-0540-0},

issn = {1573-6792},

year  = {2017},

date = {2017-05-00},

journal = {Brain Topogr},

volume = {30},

number = {3},

pages = {343--351},

publisher = {Springer Science and Business Media LLC},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Shin2017b,

title = {Evaluation of a Compact Hybrid Brain-Computer Interface System},

author = {Jaeyoung Shin and Klaus-Robert Müller and Christoph H. Schmitz and Do-Won Kim and Han-Jeong Hwang},

doi = {10.1155/2017/6820482},

issn = {2314-6141},

year  = {2017},

date = {2017-00-00},

journal = {BioMed Research International},

volume = {2017},

pages = {1--11},

publisher = {Wiley},

abstract = {We realized a compact hybrid brain-computer interface (BCI) system by integrating a portable near-infrared spectroscopy (NIRS) device with an economical electroencephalography (EEG) system. The NIRS array was located on the subjects’ forehead, covering the prefrontal area. The EEG electrodes were distributed over the frontal, motor/temporal, and parietal areas. The experimental paradigm involved a Stroop word-picture matching test in combination with mental arithmetic (MA) and baseline (BL) tasks, in which the subjects were asked to perform either MA or BL in response to congruent or incongruent conditions, respectively. We compared the classification accuracies of each of the modalities (NIRS or EEG) with that of the hybrid system. We showed that the hybrid system outperforms the unimodal EEG and NIRS systems by 6.2% and 2.5%, respectively. Since the proposed hybrid system is based on portable platforms, it is not confined to a laboratory environment and has the potential to be used in real-life situations, such as in neurorehabilitation.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Hwang2017,

title = {Editorial: Neural Engineering for Rehabilitation},

author = {Han-Jeong Hwang and Do-Won Kim and Janne M. Hahne and Jongsang Son},

doi = {10.1155/2017/9638098},

issn = {2314-6141},

year  = {2017},

date = {2017-00-00},

urldate = {2017-00-00},

journal = {BioMed Research International},

volume = {2017},

pages = {1--2},

publisher = {Wiley},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Shim2016,

title = {Machine-learning-based diagnosis of schizophrenia using combined sensor-level and source-level EEG features},

author = {Miseon Shim and Han-Jeong Hwang and Do-Won Kim and Seung-Hwan Lee and Chang-Hwan Im},

doi = {10.1016/j.schres.2016.05.007},

issn = {0920-9964},

year  = {2016},

date = {2016-10-00},

journal = {Schizophrenia Research},

volume = {176},

number = {2-3},

pages = {314--319},

publisher = {Elsevier BV},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Hwang2016,

title = {Toward more intuitive brain–computer interfacing: classification of binary covert intentions using functional near-infrared spectroscopy},

author = {Han-Jeong Hwang and Han Choi and Jeong-Youn Kim and Won-Du Chang and Do-Won Kim and Kiwoong Kim and Sungho Jo and Chang-Hwan Im},

doi = {10.1117/1.jbo.21.9.091303},

issn = {1083-3668},

year  = {2016},

date = {2016-09-01},

journal = {J. Biomed. Opt},

volume = {21},

number = {9},

publisher = {SPIE-Intl Soc Optical Eng},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Shim2016b,

title = {Influence of spatial frequency and emotion expression on face processing in patients with panic disorder},

author = {Miseon Shim and Do-Won Kim and Sunkyung Yoon and Gewnhi Park and Chang-Hwan Im and Seung-Hwan Lee},

doi = {10.1016/j.jad.2016.02.063},

issn = {0165-0327},

year  = {2016},

date = {2016-06-00},

journal = {Journal of Affective Disorders},

volume = {197},

pages = {159--166},

publisher = {Elsevier BV},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Kim2016,

title = {Integrative Evaluation of Automated Massage Combined with Thermotherapy: Physical, Physiological, and Psychological Viewpoints},

author = {Do-Won Kim and Dae Woon Lee and Joergen Schreiber and Chang-Hwan Im and Hansung Kim},

doi = {10.1155/2016/2826905},

issn = {2314-6141},

year  = {2016},

date = {2016-00-00},

journal = {BioMed Research International},

volume = {2016},

pages = {1--8},

publisher = {Wiley},

abstract = {Various types of massages are reported to relieve stress, pain, and anxiety which are beneficial for rehabilitation; however, more comprehensive studies are needed to understand the mechanism of massage therapy. In this study, we investigated the effect of massage therapy, alone or in combination with infrared heating, on 3 different aspects: physical, physiological, and psychological. Twenty-eight healthy university students were subjected to 3 different treatment conditions on separate days, one condition per day: control, massage only, or massage with infrared heating. Physical (trunk extension [TE]; maximum power of erector spinae), physiological (heart-rate variability [HRV]; electroencephalogram [EEG]), and psychological (state-trait anxiety inventory [STAI]; visual analogue scale [VAS]) measurements were evaluated and recorded before and after each treatment condition. The results showed that massage therapy, especially when combined with infrared heating, significantly improved physical functioning, increased parasympathetic response, and decreased psychological stress and anxiety. In the current study, we observed that massage therapy contributes to various physical, physiological, and psychological changes, where the effect increases with thermotherapy.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Lee2016,

title = {Dysfunctional Patterns of Gamma-Band Activity in Response to Human Faces Compared to Non-Facial Stimuli in Patients with Schizophrenia},

author = {Seung-Hwan Lee and Sangrae Kim and Mi-Seon Shim and Do-Won Kim and Chang-Hwan Im},

doi = {10.4306/pi.2016.13.3.349},

issn = {1976-3026},

year  = {2016},

date = {2016-00-00},

journal = {Psychiatry Investig},

volume = {13},

number = {3},

publisher = {Korean Neuropsychiatric Association},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Roh2015,

title = {Quantitative Electroencephalography Reflects Inattention, Visual Error Responses, and Reaction Times in Male Patients with Attention Deficit Hyperactivity Disorder},

author = {Sang-Choong Roh and Eun-Jin Park and Young-Chun Park and Sun-Kyung Yoon and Joong-Gu Kang and Do-won Kim and Seung-Hwan Lee},

doi = {10.9758/cpn.2015.13.2.180},

issn = {2093-4327},

year  = {2015},

date = {2015-08-31},

journal = {Clin Psychopharmacol Neurosci},

volume = {13},

number = {2},

pages = {180--187},

publisher = {Korean College of Neuropsychopharmacology},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Kang2015,

title = {Brain Networks Responsible for Sense of Agency: An EEG Study},

author = {Suk Yun Kang and Chang-Hwan Im and Miseon Shim and Fatta B. Nahab and Jihye Park and Do-Won Kim and John Kakareka and Nathanial Miletta and Mark Hallett},

editor = {Doron Friedman},

doi = {10.1371/journal.pone.0135261},

issn = {1932-6203},

year  = {2015},

date = {2015-08-13},

journal = {PLoS ONE},

volume = {10},

number = {8},

publisher = {Public Library of Science (PLoS)},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Kim2015,

title = {Early visual processing deficits in patients with schizophrenia during spatial frequency-dependent facial affect processing},

author = {Do-Won Kim and Miseon Shim and Myeong Ju Song and Chang-Hwan Im and Seung-Hwan Lee},

doi = {10.1016/j.schres.2014.12.020},

issn = {0920-9964},

year  = {2015},

date = {2015-02-00},

journal = {Schizophrenia Research},

volume = {161},

number = {2-3},

pages = {314--321},

publisher = {Elsevier BV},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Choi2014,

title = {The effects of 3 weeks of rTMS treatment on P200 amplitude in patients with depression},

author = {Kyung Mook Choi and Kyoung-Mi Jang and Kuk In Jang and Yoo Hyun Um and Myung-Sun Kim and Do-Won Kim and Dongkyoo Shin and Jeong-Ho Chae},

doi = {10.1016/j.neulet.2014.06.003},

issn = {0304-3940},

year  = {2014},

date = {2014-08-00},

journal = {Neuroscience Letters},

volume = {577},

pages = {22--27},

publisher = {Elsevier BV},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Hwang2014,

title = {Evaluation of various mental task combinations for near-infrared spectroscopy-based brain-computer interfaces},

author = {Han-Jeong Hwang and Jeong-Hwan Lim and Do-Won Kim and Chang-Hwan Im},

doi = {10.1117/1.jbo.19.7.077005},

issn = {1083-3668},

year  = {2014},

date = {2014-07-01},

journal = {J. Biomed. Opt},

volume = {19},

number = {7},

publisher = {SPIE-Intl Soc Optical Eng},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Shim2014,

title = {Disruptions in small-world cortical functional connectivity network during an auditory oddball paradigm task in patients with schizophrenia},

author = {Miseon Shim and Do-Won Kim and Seung-Hwan Lee and Chang-Hwan Im},

doi = {10.1016/j.schres.2014.04.012},

issn = {0920-9964},

year  = {2014},

date = {2014-07-00},

journal = {Schizophrenia Research},

volume = {156},

number = {2-3},

pages = {197--203},

publisher = {Elsevier BV},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Kim2014,

title = {Inconsistent outcomes of transcranial direct current stimulation may originate from anatomical differences among individuals: Electric field simulation using individual MRI data},

author = {Jung-Hoon Kim and Do-Won Kim and Won Hyuk Chang and Yun-Hee Kim and Kiwoong Kim and Chang-Hwan Im},

doi = {10.1016/j.neulet.2014.01.054},

issn = {0304-3940},

year  = {2014},

date = {2014-04-00},

journal = {Neuroscience Letters},

volume = {564},

pages = {6--10},

publisher = {Elsevier BV},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Kim2013b,

title = {Source Activation of P300 Correlates with Negative Symptom Severity in Patients with Schizophrenia},

author = {Do-Won Kim and Miseon Shim and Jeong-In Kim and Chang-Hwan Im and Seung-Hwan Lee},

doi = {10.1007/s10548-013-0306-x},

issn = {1573-6792},

year  = {2014},

date = {2014-03-00},

journal = {Brain Topogr},

volume = {27},

number = {2},

pages = {307--317},

publisher = {Springer Science and Business Media LLC},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Kim2013,

title = {Positive and negative symptom scores are correlated with activation in different brain regions during facial emotion perception in schizophrenia patients: A voxel-based sLORETA source activity study},

author = {Do-Won Kim and Han-Sung Kim and Seung-Hwan Lee and Chang-Hwan Im},

doi = {10.1016/j.schres.2013.10.025},

issn = {0920-9964},

year  = {2013},

date = {2013-12-00},

journal = {Schizophrenia Research},

volume = {151},

number = {1-3},

pages = {165--174},

publisher = {Elsevier BV},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Kim2012,

title = {Electrophysiological correlates of object-repetition effects: sLORETA imaging with 64-channel EEG and individual MRI},

author = {Myung-Sun Kim and Kyoung-Mi Jang and Huije Che and Do-Won Kim and Chang-Hwan Im},

doi = {10.1186/1471-2202-13-124},

issn = {1471-2202},

year  = {2012},

date = {2012-12-00},

journal = {BMC Neurosci},

volume = {13},

number = {1},

publisher = {Springer Science and Business Media LLC},

abstract = {AbstractBackgroundWe investigated the electrophysiological correlates of object-repetition effects using an object categorization task, standardized low-resolution electromagnetic tomography (sLORETA), and individual magnetic resonance imaging. Sixteen healthy adults participated, and a total of 396 line drawings of living and non-living objects were used as stimuli. Of these stimuli, 274 were presented only once, and 122 were repeated after one to five intervening pictures. Participants were asked to categorize the objects as living or non-living things by pressing one of two buttons.ResultsThe old/new effect (i.e., a faster response time and more positive potentials in response to repeated stimuli than to stimuli initially presented) was observed at 350-550 ms post-stimulus. The distributions of cortical sources for the old and new stimuli were very similar at 250-650 ms after stimulus-onset. Activation in the right middle occipital gyrus/cuneus, right fusiform gyrus, left superior temporal gyrus, and right inferior frontal gyrus was significantly reduced in response to old compared with new stimuli at 250-350, 350-450, 450-550, and 550-650 ms after stimulus-onset, respectively. Priming in response time was correlated with the electrophysiological priming at left parietal area and repetition suppression at left superior temporal gyrus in 450-550 ms.ConclusionsThese results suggest processing of repeated objects is facilitated by sharpening perceptual representation and by efficient detection or attentional control of repeated objects.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Park2012,

title = {Individual differences in cardiac vagal tone are associated with differential neural responses to facial expressions at different spatial frequencies: An ERP and sLORETA study},

author = {Gewnhi Park and Eunok Moon and Do-Won Kim and Seung-Hwan Lee},

doi = {10.3758/s13415-012-0111-0},

issn = {1531-135X},

year  = {2012},

date = {2012-12-00},

journal = {Cogn Affect Behav Neurosci},

volume = {12},

number = {4},

pages = {777--793},

publisher = {Springer Science and Business Media LLC},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Kim2012b,

title = {Clinical Implications of Quantitative Electroencephalography and Current Source Density in Patients with Alzheimer’s Disease},

author = {Ji-Sun Kim and Seung-Hwan Lee and Gewnhi Park and Sangrae Kim and Sung-Man Bae and Do-Won Kim and Chang-Hwan Im},

doi = {10.1007/s10548-012-0234-1},

issn = {1573-6792},

year  = {2012},

date = {2012-10-00},

journal = {Brain Topogr},

volume = {25},

number = {4},

pages = {461--474},

publisher = {Springer Science and Business Media LLC},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Jung2012,

title = {Reduced source activity of event-related potentials for affective facial pictures in schizophrenia patients},

author = {Hyung-Tae Jung and Do-Won Kim and Sangrae Kim and Chang-Hwan Im and Seung-Hwan Lee},

doi = {10.1016/j.schres.2011.10.023},

issn = {0920-9964},

year  = {2012},

date = {2012-04-00},

journal = {Schizophrenia Research},

volume = {136},

number = {1-3},

pages = {150--159},

publisher = {Elsevier BV},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Bae2011,

title = {Source imaging of P300 auditory evoked potentials and clinical correlations in patients with posttraumatic stress disorder},

author = {Kyung-Yeol Bae and Do-Won Kim and Chang-Hwan Im and Seung-Hwan Lee},

doi = {10.1016/j.pnpbp.2011.08.002},

issn = {0278-5846},

year  = {2011},

date = {2011-12-00},

journal = {Progress in Neuro-Psychopharmacology and Biological Psychiatry},

volume = {35},

number = {8},

pages = {1908--1917},

publisher = {Elsevier BV},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Hwang2011,

title = {An EEG-based real-time cortical functional connectivity imaging system},

author = {Han-Jeong Hwang and Kyung-Hwan Kim and Young-Jin Jung and Do-Won Kim and Yong-Ho Lee and Chang-Hwan Im},

doi = {10.1007/s11517-011-0791-6},

issn = {1741-0444},

year  = {2011},

date = {2011-09-00},

journal = {Med Biol Eng Comput},

volume = {49},

number = {9},

pages = {985--995},

publisher = {Springer Science and Business Media LLC},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Park2011,

title = {A Novel Array-Type Transcranial Direct Current Stimulation (tDCS) System for Accurate Focusing on Targeted Brain Areas},

author = {Ji-Hye Park and Seung Bong Hong and Do-Won Kim and Minah Suh and Chang-Hwan Im},

doi = {10.1109/tmag.2010.2072987},

issn = {1941-0069},

year  = {2011},

date = {2011-05-00},

journal = {IEEE Trans. Magn.},

volume = {47},

number = {5},

pages = {882--885},

publisher = {Institute of Electrical and Electronics Engineers (IEEE)},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Kim2011,

title = {Classification of selective attention to auditory stimuli: Toward vision-free brain–computer interfacing},

author = {Do-Won Kim and Han-Jeong Hwang and Jeong-Hwan Lim and Yong-Ho Lee and Ki-Young Jung and Chang-Hwan Im},

doi = {10.1016/j.jneumeth.2011.02.007},

issn = {0165-0270},

year  = {2011},

date = {2011-04-00},

journal = {Journal of Neuroscience Methods},

volume = {197},

number = {1},

pages = {180--185},

publisher = {Elsevier BV},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Park2010,

title = {The loudness dependence of the auditory evoked potential (LDAEP) as a predictor of the response to escitalopram in patients with generalized anxiety disorder},

author = {Young-Min Park and Do-Won Kim and Sangrae Kim and Chang-Hwan Im and Seung-Hwan Lee},

doi = {10.1007/s00213-010-2061-y},

issn = {1432-2072},

year  = {2011},

date = {2011-02-00},

journal = {Psychopharmacology},

volume = {213},

number = {2-3},

pages = {625--632},

publisher = {Springer Science and Business Media LLC},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Lee2010,

title = {Dysfunctional gamma-band activity during face structural processing in schizophrenia patients},

author = {Seung-Hwan Lee and Do-Won Kim and Eun-Young Kim and Sangrae Kim and Chang-Hwan Im},

doi = {10.1016/j.schres.2010.02.1058},

issn = {0920-9964},

year  = {2010},

date = {2010-06-00},

journal = {Schizophrenia Research},

volume = {119},

number = {1-3},

pages = {191--197},

publisher = {Elsevier BV},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Lee2010b,

title = {Global synchronization index as a biological correlate of cognitive decline in Alzheimer's disease},

author = {Seung-Hwan Lee and Young-Min Park and Do-Won Kim and Chang-Hwan Im},

doi = {10.1016/j.neures.2009.12.004},

issn = {0168-0102},

year  = {2010},

date = {2010-04-00},

journal = {Neuroscience Research},

volume = {66},

number = {4},

pages = {333--339},

publisher = {Elsevier BV},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Im2010,

title = {Estimation of directional coupling between cortical areas using Near-Infrared Spectroscopy (NIRS)},

author = {Chang-Hwan Im and Young-Jin Jung and Seungduk Lee and Dalkwon Koh and Do-Won Kim and Beop-Min Kim},

doi = {10.1364/oe.18.005730},

issn = {1094-4087},

year  = {2010},

date = {2010-00-00},

journal = {Opt. Express},

volume = {18},

number = {6},

publisher = {Optica Publishing Group},

keywords = {},

pubstate = {published},

tppubtype = {article}

}