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• W2952031330 abstract "Abstract We are developing an autonomously updating brain machine interface (BMI) utilizing reinforcement learning principles. One aspect of this system is a neural critic that determines reward expectations from neural activity. This critic is then used to update a BMI decoder towards an improved performance from the user’s perspective. Here we demonstrate the ability of a neural critic to classify trial reward value given activity from the primary motor cortex (M1), using neural features from single/multi units (SU/MU), and local field potentials (LFPs) with prediction accuracies up to 97% correct . A nonhuman primate subject conducted a cued center out reaching task, either manually, or observationally. The cue indicated the reward value of a trial. Features such as power spectral density (PSD) of the LFPs and spike-field coherence (SFC) between SU/MU and corresponding LFPs were calculated and used as inputs to several classifiers. We conclude that hybrid features of PSD and SFC show higher classification performance than PSD or SFC alone (accuracy was 92% for manual tasks, and 97% for observational). In the future, we will employ these hybrid features towards our autonomously updating BMI." @default.
• W2952031330 created "2019-06-27" @default.
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• W2952031330 date "2018-01-19" @default.
• W2952031330 modified "2023-09-24" @default.
• W2952031330 title "Near Perfect Neural Critic from Motor Cortical Activity Toward an Autonomously Updating Brain Machine Interface" @default.
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• W2952031330 doi "https://doi.org/10.1101/250316" @default.
• W2952031330 hasPublicationYear "2018" @default.
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