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Content Provider | IEEE Xplore Digital Library |
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Author | Acharya, S. Aggarwal, V. Tenore, F. Hyun-Chool Shin Etienne-Cummings, R. Schieber, M.H. Thakor, N.V. |
Copyright Year | 2007 |
Description | Author affiliation: Dept. of Biomed. Eng. & Electr. & Comput. Eng., Johns Hopkins Univ., Baltimore, MD (Acharya, S.; Aggarwal, V.; Tenore, F.; Hyun-Chool Shin; Etienne-Cummings, R.; Schieber, M.H.; Thakor, N.V.) |
Abstract | Advances in brain-computer interfaces (BCI) have enabled direct neural control of robotic and prosthetic devices. However, it remains unknown whether cortical signals can be decoded in real-time to replicate dexterous movements of individual fingers and the wrist. In this study, single unit activity from 115 task-related neurons in the primary motor cortex (Ml) of a trained rhesus monkey were recorded, as it performed individuated movements of the fingers and wrist of the right hand. Virtual multi-unit ensembles, or voxels, were created by randomly selecting contiguous subpopulations of these neurons. Non-linear hierarchical filters using artificial neural networks (ANNs) were designed to asynchronously decode the activity from multiple virtual ensembles, in real-time. The decoded output was then used to actuate individual fingers of a robotic hand. An average real-time decoding accuracy of greater than 95 % was achieved with all neurons from randomly placed voxels containing 48 neurons, and up to 80% with as few as 25 neurons. These results suggest that dexterous control of individual digits and wrist of a prosthetic hand can be achieved by real-time decoding of neuronal ensembles from the Ml hand area in primates. |
Starting Page | 200 |
Ending Page | 203 |
File Size | 283119 |
Page Count | 4 |
File Format | |
ISBN | 1424407915 |
DOI | 10.1109/CNE.2007.369646 |
Language | English |
Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
Publisher Date | 2007-05-02 |
Publisher Place | USA |
Access Restriction | Subscribed |
Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
Subject Keyword | Wrist Filters Neurons Fingers Robot control Artificial neural networks Decoding Prosthetic hand Brain computer interfaces Neural prosthesis |
Content Type | Text |
Resource Type | Article |
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