Changes in the activity of various parts of the sympathetic nervous system following stimulation of the mechanicoreceptors of the rectum

Autor: T. S. Lagutina
Rok vydání: 1964
Předmět:
Zdroj: Bulletin of Experimental Biology and Medicine. 57:10-14
ISSN: 1573-8221
0007-4888
DOI: 10.1007/bf00783463
Popis: Acute experiments were staged on cats. Changes in the efferent sympathetic impulsation in the hypogastric, intestinal, renal, splenic, cardiac nerves and in the saphenous and the cervical sympathetic stem were studied following stimulation of the rectal mechanicoceptors by stimuli of different intensity. The relationship of the nature of changes provoked in the efferent sympathetic impulsation to different organs and body areas to the intensity of stimuli applied to the rectal mechanoceptors proved to be the same as in stimulation of the mechanoceptors of the urinary bladder. However, the threshold of appearance of the impulsation changes following stimulation of the rectal mechanicoceptors was higher than after stimulation of those of the bladder. In rectal stimulation the first stage of impulsation inhibition was much more profound in all the nerves and was observed over a greater intensity range than in stimulation of vesical receptors. Since this impulsation controlled the vascular tone, the dilatation reaction of the vessels in response to rectal stimulation was more, and constriction less intensive than following vesical stimulation; vasodilatory reactions prevailed in the majority of the areas. Due to this fact stimulation of the rectum provokes mainly depressor reactions of systemic arterial pressure, and pressor reactions ensure only in response to stimulation of considerable intensity.
Databáze: OpenAIRE
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