局部场电位
模式识别(心理学)
信号(编程语言)
解码方法
计算机科学
特征(语言学)
人工智能
相关系数
相互信息
主成分分析
特征提取
降维
还原(数学)
频带
包络线(雷达)
数学
算法
电信
机器学习
几何学
带宽(计算)
雷达
程序设计语言
神经科学
语言学
哲学
生物
作者
Abed Khorasani,Reza Foodeh,Vahid Shalchyan,Mohammad Reza Daliri
出处
期刊:IEEE Transactions on Neural Systems and Rehabilitation Engineering
[Institute of Electrical and Electronics Engineers]
日期:2018-01-01
卷期号:26 (1): 18-25
被引量:14
标识
DOI:10.1109/tnsre.2017.2751579
摘要
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.
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