Rheographic recording of circulatory variations on the forearm following caloric-vestibular stimulation in 33 tests on 25 subjects showed no significance in 10 subjects (30° water, fasting), while 5 persons (30° water, non-fasting) exhibited significance during the periods 60–70 sec and 80–90 sec after the start of the irrigation. In 10 persons (20°C water, non-fasting) there was significance 80–90 sec and 100–110 sec after the irrigation was started. In a control group of 8 out of the 25 subjects (37°C water, non-fasting) significance was found 100–110 sec after the irrigatio