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Fig. 12. Cycle histograms relating the precision of temporal patterning to
vibrotactile stimuli at peak frequency of activation. (A) Representative cycle
histograms from each of the three receptor classes (N=100). (B) Three
units with the highest degree of phase locking (N=100). (C) There was
adequate data present to calculate cycle histograms across each stimulus
frequency for unit number 14-4. As frequency increased the receptor became
less phase locked, however, all impulses fell within a 1 ms time frame.
V, variance; R, length of mean vector.