CROSS-CORRELATION ANALYSIS OF NEURONAL CO NNECTIONS IN CEREBELLUM OF AWAKE RABBIT

The methods of crossinterval and crosscorrelation analysis were used t o study interneuronal connections in cerebellar vermis in awake rabbit , Crosscorrelation, or spike-triggering method, complemented the analy sis of crossintervals which estimated the neuronal interaction compari ng spike sequences as point processes, Among 16 neuronal pairs recorde d intra- or extracellularly 10 pairs were considered as interconnected . Inhibitory interconnections dominated. The inhibitory neuronal inter connections were revealed in pairs with complex spikes, Neurons which constituted pairs with reciprocal excitatory-inhibitory interaction fi red only simple spikes, The variability and plasticity of common input s to Purkinje cells were seemingly lower than those of direct connecti ons which probably transmitted the output signals of Purkinje cells.