Abstract
In this paper, it was investigated how the tactile perception was caused by the impressed pressure on the trunk. When the pressure impressing the low back and abdomen of the subjects by the experimental apparatus increased, they evaluated six adjective words “contact feeling”, “comfortable”, “support feeling”, “good pressure feeling”, “bad pressure feeling”and “pain”. And we investigated the relationship between the impressed pressure and the evaluated sensory values. From the result, it was found that they recognized three adjective words “contact feeling”, “bad pressure feeling”, and “pain”as the impressed pressure increased at all measurement parts of the trunk. When a certain pressure impressed the trunk, they recognized the support feeling on the erector muscle of spine and the abdominal rectus muscle, and the good pressure feeling on the latissimus dorsi muscle, the gluteus maximus muscle and the oblique abdominal muscle.
