Nonlinear relationships in the patterns of neuronal spiking in cortical neurons.
The pattern of neuronal spiking of cortical neurons was investigated in an awake nonimmobilized rabbit. Thecharacteristics of the interspike intervals (total numberof intervals, mean interval, mean-square deviation) and of the burst (group) activity (burst number, mean spikefrequency in a burst, mean spike number for a burst, meanburst duration) were considered. Nonlinear relationshipbetween the values of mean interspike intervals and thenumber of spike bursts was found. A number of functionswere applied to describe the observed phenomena. On thebasis of regression analysis two populations of corticalneurons with distinct neuronal spiking patterns wereidentified. Bursts occur at a higher rate in one populationthan the other, although both populations exhibit burstsand are otherwise indistinguishable.
Institute of Cell Biophysics, Russian Academy of Science, Pushchino, Moscow region, 142292 Russia.
R A
RA
Chizhenkova
V Y
VY
Chernukhin
Cortex; interspike intervals; neuron; neuronalspiking; spike bursts; spontaneous activity