Table 2.

Quantification of single-pulse responses in the population of neurons.

Mean ± std	Peak amplitude	Response onset latency time	Latency to peak
CV	0.43 ± 0.10	0.28 ± 0.10	0.29 ± 0.08
Values	7.7 ± 4.8 mV	11.1 ± 3.1 ms	9.8 ± 5.6 ms

Quantified response variability across the entire population of neurons using the coefficient of variation (CV) measure. We investigated responses to inputs from 4 four channels for 12 neurons, and hence calculated the CV for N = 48 stimulus presentations, each repeated 100 times (four exceptions, see “Materials and Methods” section). For the CV of the response onset latency time, we subtracted a fixed 4 ms delay for the cuneo-thalamo-cortical pathway. The corresponding values are displayed on the second row. Altogether, the data indicated that the three measured response parameters had a large internal variability.