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Real-Time Classification of Multiunit Neural Signals Using Reduced Feature Sets

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2 Author(s)
Gregory J. Dinning ; Department of Electrical Engineering and the Biomedical Engineering Program, Carnegie-Mellon University ; Arthur C. Sanderson

Classification of characteristic neural spike shapes in multi-unit recordings is performed in real time using a reduced feature set. A model of uncorrelated signal-related noise is used to reduce the feature set by choosing a subset of aperiodic samples which is effective for discrimination between signals by a nearest-mean algorithm. Initial signal classes are determined by an unsupervised clustering algorithm applied to the reduced features of the learning set events. Classification is carried out in real time using a distance measure derived for the reduced feature set. Examples of separation and correlation of multiunit activity from cat and frog visual systems are described.

Published in:

IEEE Transactions on Biomedical Engineering  (Volume:BME-28 ,  Issue: 12 )