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Variability and correlated noise in the discharge of neurons in motor and parietal areas of the primate cortex. J Neurosci 18:1161–1170 (1998)
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BibTeX
@MISC{Lee98variabilityand,
author = {Daeyeol Lee and Nicholas L. Port and Wolfgang Kruse and Apostolos P. Georgopoulos and Neurology},
title = {Variability and correlated noise in the discharge of neurons in motor and parietal areas of the primate cortex. J Neurosci 18:1161–1170},
year = {1998}
}
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Abstract
We analyzed the magnitude and interneuronal correlation of the variability in the activity of single neurons that were recorded simultaneously using a multielectrode array in the primary motor cortex and parietal areas 2/5 in rhesus monkeys. The animals were trained to move their arms in one of eight directions as instructed by a visual target. The relationship between variability (SD) and mean of the discharge rate was described by a power function with a similar exponent (�0.57), regardless of the cortical area or the behavioral condition. We examined whether the deviation from mean activity between target onset and the end of the movement was correlated on a trial-by-trial basis with variability in activity during the hold period before target onset. In both cortical areas, for about a quarter of the neurons, the neuronal noise of these two periods was positively correlated, whereas significant negative correlations were seldom
Keyphrases
parietal area primate cortex target onset cortical area hold period discharge rate single neuron power function primary motor cortex rhesus monkey visual target mean activity whereas significant negative correlation neuronal noise multielectrode array behavioral condition similar exponent interneuronal correlation trial-by-trial basis
