[The hand and environment--physiological changes of digital functions in adult men by vibratory stimulations, water immersions and climatic conditions].

Skin temperature, 125 Hz vibratory sensibility and pinch strength of the hand were recorded continuously in adult men through water immersion tests ((1) 40 degrees C (2) 15 degrees C (3) 10 degrees C) and vibratory stress tests ((1) 32 Hz-2 g (2) 32 Hz-3g (3) 125 Hz-2 g) in climatic chambers ((1) 20 degrees C-50% humidity (2) 20 degrees C-50% (3) 30 degrees C-40% and 80%). As a stressor to the hand, the cold water immersion was the most effective. The warm water immersion was effective to slightly decrease the skin temperature and the vibratory sensibility. The younger group showed higher sensitivities of the digital functions than the older group.