Abstract
Cold-, wind-, infra-red radia t ion-stimuli and that by putting on and off coverlets were given to sleeping children, and then their vasomotor reflex was observed.
The measuring apparatus used was the plethysmograph the transducer of which was a strain-gauge. The stimuli caused by putting on and off the coverlets were accompanied by quickly followed variation on plethysmogram.
Putting on the coverlets caused vasoconstriction, vascular system constricts, but no significant variation in vascular system is caused by thermal stimuli which bring no dynamic stimulus directly to the skin, such exposure to infra-red radiation.
