Global-Leading Research and Education in Brain and Cognitive engineering KOREA UNIVERSITY To understand the structure and the key principles of high-order information processing by which brains work,
and to implement these in artificial systems that interact intelligently with real world

Research Highlight

Research
Prof. Seong-Whan Lee`s paper accepted in IEEE Transactions on Neural Systems and Rehabilitation Engineering
Author Administrator (IP: *.152.163.70) Date 2014-11-17 13:48 Views 640
원본사진보기

Prof. Seong-Whan Lee`s new research on `Decoding Three-Dimensional Trajectory of Executed and Imagined Arm Movements from Electroencephalogram Signals` was accepted in IEEE Transactions on Neural Systems and Rehabilitation Engineering.

 

Title: Decoding Three-Dimensional Trajectory of Executed and Imagined Arm Movements from Electroencephalogram Signals


Abstract:

Decoding motor commands from non-invasively measured neural signals has become important in brain-computer interface (BCI) research. Applications of BCI include neurorehabilitation after stroke and control of limb prostheses. Until now, most studies have tested simple movement trajectories in two dimensions by using constant velocity profiles. However, most real-world scenarios require much more complex movement trajectories and velocity profiles. In this study, we decoded motor commands in three dimensions from electroencephalography (EEG) recordings while the subjects either executed or observed/imagined complex upper limb movement trajectories. We compared the accuracy of simple linear methods and non-linear methods. In line with previous studies our results showed that linear decoders are an efficient and robust method for decoding motor commands. However, while we took the same precautions as previous studies to suppress eye-movement related EEG contamination, we found that subtracting residual electro-oculogram (EOG) activity from the EEG data resulted in substantially lower motor decoding accuracy for linear decoders. This effect severely limits the transfer of previous results to practical applications in which neural activation is targeted. We observed that non-linear methods showed no such drop in decoding performance. Our results demonstrate that eye-movement related contamination of brain signals constitutes a severe problem for decoding motor signals from EEG data. These results are important for developing accurate decoders of motor signal from neural signals for use with BCI-based neural prostheses and neurorehabilitation in real-world scenarios.

 

File re_img.gif(10.9K)


Research
Prof. Seong-Whan Lee`s paper accepted in IEEE Transactions on Neural Systems and Rehabilitation Engineering
Prof. Seong-Whan Lee`s paper accepted in IEEE Transactions on Neural Systems and…
Prof. Seong-Whan Lee`s new research on `Decoding Three-Dimensional Trajectory of Executed and Imagined Arm Movements from Electroencephalogram Signals` was accepted in IEEE Transactions on Neural Systems and Rehabilitation Engineering.   Title: Decoding Three-Dimensional Trajectory of Executed and Imagined Arm Movements from Electroencephalogram Signals Abstract: Decoding motor commands from non-invasively measured neural signals has be…

2014-11-17

Prof. Jae-Ho Han`s paper accepted in IEEE/ASME Transactions on Mechatronics
Prof. Jae-Ho Han`s paper accepted in IEEE/ASME Transactions on Mechatronics
Prof. Jae-Ho Han`s new research on `Experimental Study of a Hybrid Small-Signal Parameter Modeling and Extraction Method for a Micro-Optoelectronic Device` was accepted in IEEE/ASME Transactions on Mechatronics.   Title: Experimental Study of a Hybrid Small-Signal Parameter Modeling and Extraction Method for a Micro-Optoelectronic Device Abstract:  In the device performance variation and control for micro-devices, accurate models are cr…

2014-11-05

Prof. Jichai Jeong`s paper, accepted in Optics Express
Prof. Jichai Jeong`s paper, accepted in Optics Express
Prof. Jichai Jeong`s new research on `Improvement of the chromatic dispersion tolerance in coherent optical OFDM systems using shifted DFT windows for ultra-long-haul optical transmission systems` was accepted in Optics Express. Title: Improvement of the chromatic dispersion tolerance in coherent optical OFDM systems using shifted DFT windows for ultra-long-haul optical transmission systems Abstract: In a high-capacity ultra-long-haul optic…

2014-09-16

Prof. Dong-Joo Kim`s paper, accepted in BMC Medicine
Prof. Dong-Joo Kim`s paper, accepted in BMC Medicine
Prof. Dong-Joo Kim`s new research on `Quantitative Analysis of Computed Tomography Images and Early Detection of Cerebral Edema for Pediatric Traumatic Brain Injury Patients: Retrospective Study` was accepted in BMC Medicine. Title: Quantitative Analysis of Computed Tomography Images and Early Detection of Cerebral Edema for Pediatric Traumatic Brain Injury Patients: Retrospective Study Abstract: The purpose of this study was to identify wh…

2014-09-01

Prof. Seong-Whan Lee`s paper, accepted in Pattern Recognition
Prof. Seong-Whan Lee`s paper, accepted in Pattern Recognition
Prof. Seong-Whan Lee`s new research on `Nighttime Face Recognition at Large Standoff: Cross-Distance and Cross-Spectral Matching` was accepted in Pattern Recognition. Title: Nighttime Face Recognition at Large Standoff: Cross-Distance and Cross-Spectral Matching Abstract:Face recognition in surveillance systems is important for security applications, especially in nighttime scenarios where the subject is far from the camera. However, due t…

2014-06-10

Prof. Christian Wallraven`s paper, accepted in IEEE Transactions on Robotics
Prof. Christian Wallraven`s paper, accepted in IEEE Transactions on Robotics
Prof. Christian Wallraven`s new research on `Active In-Hand Object Recognition on a Humanoid Robot` was accepted in IEEE Transactions on Robotics. Title: Active In-Hand Object Recognition on a Humanoid RobotAbstract:For any robot, the ability to recognize and manipulate unknown objects is crucial to successfully work in natural environments. Object recognition and categorization is a very challenging problem, as three-dimensional objects often…

2014-05-19

PhD candidate Kang Pyungwon published paper in Journal of Neuroscience
PhD candidate Kang Pyungwon published paper in Journal of Neuroscience
Kang Pyungwon, a PhD candidate, supervised by Prof. Hackjin Kim has her paper published in Journal of Neuroscience. Title:Neural Evidence for Individual and Cultural Variability in the Social Comparison Effect Abstract:Although several studies have investigated the neural mechanism of social comparison, it remains unclear whether and how cultural membership, particularly independent versus interdependent cultures, may differentiall…

2014-04-30

Prof. Byoung-Kyong Min`s paper, accepted in Trends in Biotechnology
Prof. Byoung-Kyong Min`s paper, accepted in Trends in Biotechnology
Prof. Byoung-Kyong Min`s new research on `Electroencephalography/sonication-mediated human brain-brain interfacing technology` was accepted in Trends in Biotechnology. Title: Electroencephalography/sonication-mediated human brain-brain interfacing technology Abstract: Direct communication between two brains is an upcoming area of research. The present paper suggests feasible techniques for accomplishing neural transfer between …

2014-04-03

Prof. Christian Wallraven`s paper published in Psychonomic Bulletin & Review, 2013
Prof. Christian Wallraven`s paper published in Psychonomic Bulletin & Review, 20
Prof. Christian Wallraven`s new research on `Touching on face space: Comparing visual and haptic processing of face shapes` was also published in Psychonomic Bulletin & Review, 2013. Title:  Touching on face space: Comparing visual and haptic processing of face shapes Abstract: The idea that faces are represented within a structured face space (Valentine, 1991) has gained considerable experimental support both from physiolo…

2014-04-02

Prof. Christian Wallraven`s paper published in Psychonomic Bulletin & Review
Prof. Christian Wallraven`s paper published in Psychonomic Bulletin & Review
Prof. Christian Wallraven`s new research on `The eyes grasp, the hands see: Metric category knowledge transfers between vision and touch` was published in Psychonomic Bulletin & Review, 2013.   Title:  The eyes grasp, the hands see: Metric category knowledge transfers between vision and touch Abstract: Categorization of seen objects is often determined by the shapes of objects. However, shape is not exclusive to the visual m…

2014-04-02

 1 2 3 4 5 6 7 8