J.Jpn. Surg. Soc.. 57(7): 1177-1199, 1956
STUDIES ON THE VASOMOTOR REFLEX CAUSED BY CALORIC VESTIBULAR STIMULATION, WITH SPECIAL REFERENCE TO SYMPATHETIC VASODILATOR RESPONSE OF THE HUMAN SKIN VESSELS (STUDIES ON THE VASOMOTOR ACTIVITY IN NORMAL AND PATHOLOGICAL STATES, REPORT Ⅲ.)
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1st Surgical Department, Tokyo University School of Medicine (Director: Prof. Kentaro SHIMIZU) Chikao NAGASHIMA |
2) The temperature of the finger-tip initally shows a sudden fall and then rises gradually until it reaches the summit (up to 2-3°C) in approximately 20 minutes after stimulation. The temperature of the proximal phalanx falls rather slowly and reaches its summit, which is lower than that of the finger-tip. The temperature of the dorsum of the hand falls more slowly and to a lesser extent, and then returns to the previous level in about 20 minutes after the stimulation.
3) The volume pulse as recorded by the photoelectric plethysmograph shows a certain fluctuation concordant with the temperature rise in the finger-tip.
4) The vasodilator response is absent in the 4th and the 5th fingers when the ulnar nerve is already blocked with procaine.
5) The vasodilator response is absent on the side where the stellate ganglion block is performed.
6) The vasodilator response is abolished or depressed by cholinergic blocking agent.
7) It may be inferred from the above-mentioned results that the vasodilator response due to caloric vestibular stimulation is brought about by opening of the arterio-venous anastomoses of the finger-tip which might be caused by sympathetic cholinergic vasodilator innervation. (author's abstract)
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