Figure 2.

Mechanical (brush) response properties in units across nerves. Spikes in response to fast (A) and slow (B) brush in peroneal nerve unit. C: vigorous afterdischarge in C-tactile (CT) afferent in response to brush stimulation. The figure shows several consecutive brush strokes. D: delayed acceleration of impulse response to sustained monofilament indentation (45 mN) in peroneal nerve unit. The initial few seconds of adaptation were followed by a period of low activity for 20 s, after which firing markedly increased again for about 90 s. Note that individual spikes are not discernable and almost completely covers signal background. Inset: individual spikes superimposed (bar below spikes denotes time 1 ms). Arrows denote on and off stimulation where an increased firing is seen as the indentation stops. E–G: single-unit examples of firing across units in the different nerves in response to brush stroking velocity (0.1–30 cm/s) and fitted quadratic curve: lateral antebrachial nerve (E), radial nerve (F), and peroneal nerve (G). Each dot in E–G represents a single brush stroke.