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• W4294975632 abstract "Implanted microelectrode arrays can directly pick up electrode signals from the primary motor cortex (M1) during movement, and brain-machine interfaces (BMIs) can decode these signals to predict the directions of contemporaneous movements. However, it is not well known how much each individual input is responsible for the overall performance of a BMI decoder. In this paper, we seek to quantify how much each channel contributes to an artificial neural network (ANN)-based decoder, by measuring how much the removal of each individual channel degrades the accuracy of the output. If information on movement direction was equally distributed among channels, then the removal of one would have a minimal effect on decoder accuracy. On the other hand, if that information was distributed sparsely, then the removal of specific information-rich channels would significantly lower decoder accuracy. We found that for most channels, their removal did not significantly affect decoder performance. However, for a subset of channels (16 out of 61), removing them significantly reduced the decoder accuracy. This suggests that information is not uniformly distributed among the recording channels. We propose examining these channels further to optimize BMIs more effectively, as well as understand how M1 functions at the neuronal level." @default.
• W4294975632 created "2022-09-08" @default.
• W4294975632 creator A5020097311 @default.
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• W4294975632 date "2022-07-11" @default.
• W4294975632 modified "2023-10-14" @default.
• W4294975632 title "Information sparseness in cortical microelectrode channels while decoding movement direction using an artificial neural network" @default.
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• W4294975632 doi "https://doi.org/10.1109/embc48229.2022.9870896" @default.
• W4294975632 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/36085749" @default.
• W4294975632 hasPublicationYear "2022" @default.
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