Brain Control of an External Device by Extracting the Highest Force-Related Contents of Local Field Potentials in Freely Moving Rats
| Autor: | Abed Khorasani, Reza Foodeh, Mohammad Reza Daliri, Vahid Shalchyan |
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| Rok vydání: | 2018 |
| Předmět: |
Male
Correlation coefficient 0206 medical engineering Biomedical Engineering Action Potentials Artificial Limbs 02 engineering and technology Local field potential Signal Reduction (complexity) 03 medical and health sciences 0302 clinical medicine Internal Medicine Animals Rats Wistar Simulation Mathematics Principal Component Analysis business.industry General Neuroscience Rehabilitation Motor Cortex Reproducibility of Results Pattern recognition Mutual information Filter (signal processing) Models Theoretical 020601 biomedical engineering Biomechanical Phenomena Rats Feature (computer vision) Brain-Computer Interfaces Principal component analysis Artificial intelligence Artifacts business Algorithms Psychomotor Performance 030217 neurology & neurosurgery |
| Zdroj: | IEEE Transactions on Neural Systems and Rehabilitation Engineering. 26:18-25 |
| ISSN: | 1558-0210 1534-4320 |
| DOI: | 10.1109/tnsre.2017.2751579 |
| Popis: | A local field potential (LFP) signal is an alternative source to neural action potentials for decoding kinematic and kinetic information from the brain. Here, we demonstrate that the better extraction of force-related features from multichannel LFPs improves the accuracy of force decoding. We propose that applying canonical correlation analysis (CCA) filter on the envelopes of separate frequency bands (band-specific CCA) separates non-task related information from the LFPs. The decoding accuracy of the continuous force signal based on the proposed method were compared with three feature reduction methods: 1) band-specific principal component analysis (band-specific PCA) method that extract the components which leads to maximum variance from the envelopes of different frequency bands; 2) correlation coefficient-based (CC-based) feature reduction that selects the best features from the envelopes sorted based on the absolute correlation coefficient between each envelope and the target force signal; and 3) mutual information-based (MI-based) feature reduction that selects the best features from the envelopes sorted based on the mutual information between each envelope and output force signal. The band-specific CCA method outperformed band-specific PCA with 11% improvement, CC-based feature reduction with 16% improvement, and MI-based feature reduction with 18% improvement. In the online brain control experiments, the real-time decoded force signal from the 16-channel LFPs based on the proposed method was used to move a mechanical arm. Two rats performed 88 trials in seven sessions to control the mechanical arm based on the 16-channel LFPs. |
| Databáze: | OpenAIRE |
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