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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Hyun-Chool Shin Aggarwal, V. Acharya, S. Schieber, M.H. Thakor, N.V. |
| Copyright Year | 1964 |
| Abstract | We present an optimal method for decoding the activity of primary motor cortex (M1) neurons in a nonhuman primate during single finger movements. The method is based on the maximum-likelihood (ML) inference, which assuming the probability of finger movements is uniform, is equivalent to the maximum a posteriori (MAP) inference. Each neuron's activation is first quantified by the change in firing rate before and after finger movement. We then estimate the probability density function of this activation given finger movement, i.e., Pr(neuronal activation (x)| finger movements (m)). Based on the ML criterion, we choose finger movements to maximize Pr(x|m). Experimentally, data were collected from 115 task-related neurons in M1 as the monkey performed flexion and extension of each finger and the wrist (12 movements). With as few as 20-25 randomly selected neurons, the proposed method decoded single-finger movements with 99% accuracy. Since the training and decoding procedures in the proposed method are simple and computationally efficient, the method can be extended for real-time neuroprosthetic control of a dexterous hand. |
| Sponsorship | IEEE Engineering in Medicine and Biology Society |
| Page Count | 7 |
| File Size | 898411 |
| Starting Page | 754 |
| Ending Page | 760 |
| File Format | |
| ISSN | 00189294 |
| Volume Number | 57 |
| Issue Number | 3 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2010-03-01 |
| Publisher Place | U.S.A. |
| Access Restriction | One Nation One Subscription (ONOS) |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Maximum likelihood decoding Fingers Neural prosthesis Maximum likelihood estimation Neurons Biomedical engineering Information technology Probability density function Wrist Prosthetics Skellam Finger movements maximum likelihood neural decoding neural prosthetics |
| Content Type | Text |
| Resource Type | Article |
| Subject | Biomedical Engineering |
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