抄録
Tactile sensation of the human hand was measured using two methods : static two-point discrimination test (s2PD) and moving two-point discrimination test (m2PD). The volar side of the right hand of ten subjects (21-24 year old men) was divided into 29 areas each, according to the location of finger joints and the innervation regions of peripheral and peripheral nerves. The shortest threshold of s2PD was measured in the 2nd distal phalanx, which value was 1.4 mm±0.5 mm, and the shortest threshold of m2PD was also measured in the 2nd distal phalanx, which value was 0.7 mm±0.5 mm. In all 29 areas, the threshold of m2PD was significantly (P<0.01) shorter than that of s2PD. That is, the dynamic stimulus allows generating much response of mechanoreceptive afferent units than the static stimulus. The strong correlation (r=0.95) was found between the threshold of s2PD and that of m2PD on the volar side of human hand.
