Figure 2. Firing patterns of back skin MVC-type and CVC-type fibres.

A, traces from top show: skin temperature; few-fibre activity in a filament split from the nerve to back skin; identified single unit spikes extracted from the neurogram (1 CVC-type and 2 MVC-type fibres, denoted a and b). Their individual waveforms (superimposed spikes on expanded timescale) are shown below. B, chart record showing skin temperature (top trace), blood pressure (bottom trace) and the responses of the same three single units (as indicated) to four successive episodes of skin cooling. C, arterial pulse-triggered histograms of the ongoing activity (during cooling) of the same three single units (10 ms bins, from top 350, 96 and 185 counted spikes), shown above the corresponding arterial pressure waveform.