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Titolo:
EFFECTS OF AORTIC NERVE-STIMULATION ON DISCHARGES OF SYMPATHETIC NEURONS INNERVATING RAT TAIL ARTERY AND VEIN
Autore:
JOHNSON CD; GILBEY MP;
Indirizzi:
ROYAL FREE HOSP,SCH MED,DEPT PHYSIOL,AUTONOM NEUROSCI INST,ROWLAND HILL ST LONDON NW3 2PF ENGLAND ROYAL FREE HOSP,SCH MED,DEPT PHYSIOL,AUTONOM NEUROSCI INST LONDON NW32PF ENGLAND
Titolo Testata:
American journal of physiology. Regulatory, integrative and comparative physiology
fascicolo: 4, volume: 44, anno: 1998,
pagine: 942 - 949
SICI:
0363-6119(1998)44:4<942:EOANOD>2.0.ZU;2-B
Fonte:
ISI
Lingua:
ENG
Soggetto:
SKELETAL-MUSCLE; BARORECEPTOR STIMULATION; CIRCULATION; RESPONSES; SKIN; CAT; HINDLIMB; RHYTHM;
Keywords:
BARORECEPTOR; SYMPATHETIC RHYTHMS; BAROREFLEX;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
23
Recensione:
Indirizzi per estratti:
Citazione:
C.D. Johnson e M.P. Gilbey, "EFFECTS OF AORTIC NERVE-STIMULATION ON DISCHARGES OF SYMPATHETIC NEURONS INNERVATING RAT TAIL ARTERY AND VEIN", American journal of physiology. Regulatory, integrative and comparative physiology, 44(4), 1998, pp. 942-949

Abstract

Activity was recorded from postganglionic sympathetic neurons (PSNs) innervating either the caudal ventral artery (CVA) or a lateral vein (LV) of the tail circulation of anesthetized rats. The study sought to determine whether sympathetic activity directed at the CVA and LV was influenced by cardiovascular mechanoreceptor afferents and whether this effect was differential. Cardiac rhythmicity was not a robust component of either CVA PSN activity or LV PSN activity. Stimulation of an aortic nerve with short trains was followed by a decreased probability of discharge in both CVA and LV PSNs that was followed by a series of peaks that showed a constant periodicity that was not significantly different from that revealed by autocorrelogram analysis over the same data set. The latter dominant periodicity is referred to in this and related previous publications as the T rhythm. Furthermore, blood volumeexpansion and long-train aortic nerve stimulation produced a significant decrease in the frequency of the T rhythm. It is concluded that the CVA and LV sympathetic activity can be influenced by inputs from cardiovascular mechanoreceptors and that this effect is mediated in part by a modulation of the T rhythm.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 24/09/20 alle ore 23:56:14