Decoding two-dimensional movement trajectories using electrocorticographic signals in humans
| Autor: | Gerwin Schalk, Daniel W. Moran, Eric C. Leuthardt, Jonathan R. Wolpaw, D Limbrick, Lester A. Gerhardt, Kai J. Miller, Nick Anderson, Jan Kubanek, Jeffrey G. Ojemann |
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| Rok vydání: | 2007 |
| Předmět: |
Adult
Male Movement Interface (computing) Biomedical Engineering Kinematics Stability (probability) Cellular and Molecular Neuroscience Humans Brain–computer interface Cerebral Cortex Brain Mapping business.industry Electroencephalography Pattern recognition Evoked Potentials Motor Microelectrode Feature (computer vision) Control system Arm Female Artificial intelligence business Psychology Neuroscience Algorithms Decoding methods |
| Zdroj: | Journal of Neural Engineering. 4:264-275 |
| ISSN: | 1741-2552 1741-2560 |
| DOI: | 10.1088/1741-2560/4/3/012 |
| Popis: | Signals from the brain could provide a non-muscular communication and control system, a brain-computer interface (BCI), for people who are severely paralyzed. A common BCI research strategy begins by decoding kinematic parameters from brain signals recorded during actual arm movement. It has been assumed that these parameters can be derived accurately only from signals recorded by intracortical microelectrodes, but the long-term stability of such electrodes is uncertain. The present study disproves this widespread assumption by showing in humans that kinematic parameters can also be decoded from signals recorded by subdural electrodes on the cortical surface (ECoG) with an accuracy comparable to that achieved in monkey studies using intracortical microelectrodes. A new ECoG feature labeled the local motor potential (LMP) provided the most information about movement. Furthermore, features displayed cosine tuning that has previously been described only for signals recorded within the brain. These results suggest that ECoG could be a more stable and less invasive alternative to intracortical electrodes for BCI systems, and could also prove useful in studies of motor function. |
| Databáze: | OpenAIRE |
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