Table 1.

Electrophysiological characteristics of the selected neuronal populations.

	Number of neurons	Number of trials	Firing rate (spike.s−1)	Inter-spike interval (ms)	CV of the inter-spike interval
STN	14	81.0 ± 18.0	19.5 ± 14.2	60.7 ± 32.5	0.83 ± 0.24
Striatum (PANs)	39	85.4 ± 11.5	5.0 ± 3.9	93.1 ± 26.6	1.22 ± 0.18
GPe	71	78.3 ± 9.7	60.0 ± 20.9	18.4 ± 7.3	1.10 ± 0.36

Each row represents a structure of the basal ganglia (STN for Subthalamic Nucleus, PANs for the Phasically Active Neurons of the Striatum and GPe for the external segment of the globus pallidus). The columns show the number of neurons selected for the analysis, the number of trials during which they were recorded and the mean and standard deviation of their electrophysiological characteristics. The coefficient of variation of the inter-spike interval (ISI) was computed by dividing the standard deviation of the ISI by the mean of the ISI.