PMID: 9531451Apr 8, 1998Paper

Segmental origin of sympathetic preganglionic neurones regulating the tail circulation in the rat

Journal of the Autonomic Nervous System
J E Smith, M P Gilbey

Abstract

The spinal segments of origin of the sympathetic preganglionic neurones (SPNs) influencing the activity of sympathetic postganglionic neurones innervating the tail have been studied using a neurophysiological approach. Activity was recorded from the ventral collector nerve that carries 70% of the sympathetic fibres innervating targets within the tail and provides 80% of the innervation of the caudal ventral artery. When recording activity from the ventral collector nerve at the tail base, the largest responses were evoked following electrical stimulation within spinal segments lumbar (L) 1 and 2 and smaller responses from thoracic (T) 13 (n = 5). Although similar responses to those recorded from the tail base were elicited from spinal segments L1 and L2, when activity was recorded from mid-tail only minimal responses were evoked from T13 (n = 6). On average robust responses were never elicited following stimulation beyond these segments. Responses had latencies compatible with conduction over C-fibre axons and were absent following ganglionic blockade. It is concluded that SPNs influencing the tail circulation reside mainly in L1 and L2 spinal segments and there is also a substantial but lesser contribution arising from segment...Continue Reading

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Citations

Jan 31, 2004·Pharmacology, Biochemistry, and Behavior·Srividya Subramanian, Regis R Vollmer
Jul 28, 2001·Autonomic Neuroscience : Basic & Clinical·J E Smith
Jan 7, 2006·The Journal of Physiology·Nephtali MarinaMichael P Gilbey
Jan 23, 2015·Frontiers in Neuroscience·Hussain Al Dera, James A Brock
Apr 17, 2002·The Journal of Physiology·Mutsumi TanakaKazuyuki Kanosue
Dec 24, 2004·Anesthesia and Analgesia·Hendrik FreiseAndreas W Sielenkämper
Nov 15, 2011·American Journal of Physiology. Heart and Circulatory Physiology·Hussain Al DeraJames A Brock
Sep 18, 2001·The Journal of Physiology·J A RathnerR M McAllen

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