Fig. 2. Autocorrelation [C(n)] analysis of a primary afferent (PA) fiber
(A) and a dorsal octavolateral nucleus (DON) unit (B). Solid lines, original
data; dotted lines, shuffled data. Only the PA shows long-range
autocorrelation. (C) Autocorrelation index of 30 PA fibers and 60 DON units
plotted against the mean firing rate. Note the lack of higher autocorrelation
values in DON units.