Tactile allodynia post unilateral common peroneal nerve ligation. (A, B) Ipsilateral (A) and contralateral (B) hind paw withdrawals in response to tactile stimulus were plotted against the time. Significant higher scores of allodynia were observed on the nerve injured side than the intact side. (C) Circled area indicates the location receiving von Frey filament touch. * P < 0.05 (n = 4).