抄録
A study was undertaken concerning the relationship between the electrical phenomenon of the central nervous system caused by stimulating rabbit's brain stem reticular formation and thalamus and the intestinal movement.
Simultaneously with the appeara nce of the spike and wave in the electroencephalograms by a 3 c/s electric stimulation of nucl. ventralis anterior (VA), nucl. centrum medianum (CM), the intestinal movement was observed to be accelerated. With the 8 c/s stimulation of VA, the intestinal movement was accelerated with consequence upon the onset of a recruiting response, but, in the case of 8 c/s stimulation of CM, the intestinal movement was seen to be either accelerated or inhibited. In the case of 100c/s stimulation of VA and CM, the intestinal movement indicated an inhibitory effect as the reselt of an arousal reaction.
By the 100c/s stimulation of the brain stem reticular formation, an arousal reaction was brought about, and consequntly, the intestinal movement was seen to be inhibited; when this inhibitory effect on the intestinal movement was relatively weak, much of the tonic type muscular discharge was seen in the fore and hind limbs, and on the other hand, when the inhibitory effect was strong, much of the tonic phasic type muscular discharge tended to, appear. T he inhibition of the intestinal movement by the stimulation of the brain stem reticular formation was not influenced at all by adrenalectomy and vagotomy, but it was observed to disappear by splanchnicectomy.
This inhibitory effect on the intestinal movement is assumed to be brought about via the splanchnic nerve.
The effects of cardiazol, strychnine, barbiturate, chlorpromazine, morphine, adrenaline, acetylcholine and atropine on arousal reaction and intestinal movement and the inhibitory effect of arousal reaction on intestnal movement were examined. As a result, it was assumed that the inhibitory effect of arousal reaction exerted on the intestinal movement emerges via a lower inhibitory center.
