Table 1.

Average conduction velocities, von Frey thresholds, and receptive field areas determined with von Frey probes

A-fiber nociceptors C-fiber nociceptors
Number of fibers 32 27
Conduction velocity (m/sec) 33 ± 3 0.82 ± 0.05
Receptive field area (mm2) 49 ± 8** 25 ± 3
von Frey threshold (bar) 3.9 ± 0.3 3.6 ± 0.4
  • ** p ≤ 0.01; t test.