Fig. 4. Most sensitive sites (  A ) and mean sizes (  B ) of receptive fields of high-threshold (HT) neurons located rostral and caudal to the spinal cord injury (SCI) lesion. The data of receptive field (RF) sizes were obtained from five rostral HT neurons and seven caudal HT neurons in sham-operated animals and six rostral HT neurons and four caudal HT neurons in SCI animals. Representative responses to various stimuli of HT neurons located rostral and caudal to the SCI site in control (sham-operated) animals and SCI animals (  C ). BR, brush stimulation; PI, pinch stimulation using an arterial clip with a force of 250 g/mm²; PP, pinprick stimulation using a 25-g tungsten tip; VF, stimulation using a 4-g von Frey filament. *  P < 0.05  versus that in sham-operated control animals Data are shown as means ± SD.