Neural spike sorting under nearly 0-dB signal-to-noise ratio using nonlinear energy operator and artificial neural-network classifier

Kyung Hwan Kim, Sung June Kim
2000 IEEE Transactions on Biomedical Engineering  
We report a result on neural spike sorting under conditions where the signal-to-noise ratio is very low. The use of nonlinear energy operator enables the detection of an action potential, even when the SNR is so poor that a typical amplitude thresholding method cannot be applied. The superior detection ability facilitates the collection of a training set under lower SNR than that of the methods which employ simple amplitude thresholding. Thus, the statistical characteristics of the input
more » ... of the input vectors can be better represented in the neural-network classifier. The trained neural-network classifiers yield the correct classification ratio higher than 90% when the SNR is as low as 1.2 (0.8 dB) when applied to data obtained from extracellular recording from Aplysia abdominal ganglia using a semiconductor microelectrode array. Index Terms-Extracellular recording, neural-network classifier, neural spike sorting, nonlinear energy operator, signal-to-noise ratio.
doi:10.1109/10.871415 pmid:11059176 fatcat:zcgfnevq7fdo3fjjrcigwr7cje