歯髄刺激により生ずる大脳皮質誘発電位に及ぼす身体各部の条件刺激の影響について

抄録

A number of studies have been reported on the evoked responses recorded from the peripheral nervae or central nervous system, which were elicited by the stimulation to the tooth pulp. There are, however, few studies on the interaction between the impulses from the tooth pulp and those from the various areas of the body.
In this report, the influence of the conditioning stimulus delivered to several areas of the body (nose, cheek, earlobe, hand, shoulder, foot and back) on the cortical evoked potential (C.E.P.) produced by the tooth pulp stimulation was physiologically evaluated in the cats.
The results were as follows:
(1) The amplitude of the C.E.P. was increased by the increase of the stimulating strength of the test stimulus to the tooth pulp, with the stimulus to the gingiva being constant.
(2) The amplitude of the C.E.P. elicited by the test stimulus was remarkably decreased by the application of the conditioning stimulus to the intra-segmental area and moderately decreased by that to the extra-segmental area.
(3) The change in the amplitude of the C.E.P. elicited by the stimulation to the skin of the cheek was scarcely observed, when the test stimulus was preceded by the conditioning stimulus to the tooth pulp.