Figure 4. Allodynia evoked by brushing stimuli that elicit C-tactile fibre responses.

Mean brush-evoked responses (±SEM; n = 9; grey) were expressed as a percentage of the baseline muscle pain (unshaded). Gentle brushing at speeds of 1 cm s⁻¹ and 3 cm s⁻¹ evoked a significant increase in HS-induced muscle pain (allodynia). The expression of allodynia was comparable between the two brushing speeds. Prior to the induction and on cessation of muscle pain, brushing was reported as innocuous. ***P < 0.001.