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Biomedical subjects

T Neya

Publications and source records attributed to T Neya.

At least 55 records · Page 3Linked to original sources
PubMed1976

Vasomotor response to thermal stimulation of the scrotal skin in rats.

In 27 anesthetized rats arterial blood pressure and electrical activity of dorsal horn neurones were recorded during thermal stimulation of the scrotal skin. In 19 of these animals blood pressure increased during scrotal skin warming, showing a distinct threshold at about 37.5 degrees C in 16 rats. This effect was reproducible during the whole experiment although quantitative changes of the response occurred. In most experiments a transient response was seen at the beginning of the vasomotor reaction. The mean increase of blood pressure to a superthreshold warming step, derived from 11 experiments in which more than 3 temperatures were tested and in which the blood pressure was above 100 mm Hg, was 25 +/- 14 mm Hg. The observed threshold of the vasomotor response corresponds well with the threshold of activity increase in warm sensitive dorsal horn neurones to scrotal skin warming. It is suggested that the blood pressure reaction is mediated by scrotal skin warm receptors, which supports the notion that some organ specificity exists in thermoreceptors of the scrotal skin.

Animals↗
PubMed1975

[Effects of various agents and transmural electric stimulation on the motility of isolated bile duct of the dolphin (Stenella caeruleoalbus) (author's transl)].

The isolated bile duct preparations, which contain the duodenal circular muscle, and the proper bile duct muscle preparations in the dolphin (Stenella caeruleoalbus) were used and their longitudinal motilities were recorded by means of strain gauge transducer. 1. Raising the intraluminal pressure produced the augmentation of the motility of the bile duct preparation. 2. Acetylcholine and carbamylcholine caused the increase of the motility of the bile duct preparations. After atropinization the excitatory response was completely abolished. 3. Adrenaline caused the inhibitory response more predominantly than the excitatory one in the bile duct preparations, while in the proper bile duct muscle preparations it induced the excitatory response more predominantly than the inhibitory one. Phenylephrine produced mainly the excitatory effect in both preparations, while isoprenaline did chiefly the inhibitory one. These experimental results suggest that activation of alpha- and beta-adrenergic receptors in the bile duct muscle causes the excitatory and inhibitory responses, respectively. 4. Transmural electric stimulation induced both excitatory and inhibitory responses in the bile duct preparation. The former response was abolished after atropinization, while the latter one was not. It may be, therefore, suggested that the excitatory response was induced by stimulation of cholinergic neurons, while the inhibitory one was produced by that of the adrenergic fibers and non-adrenergic inhibitory neurons.

Acetylcholine↗