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Titolo:
A technique for estimating activity in whole nerve trunks applied to the cervical sympathetic trunk, in the rabbit
Autore:
Hellstrom, F; Roatta, S; Johansson, H; Passatore, M;
Indirizzi:
Univ Turin, Div Physiol, Dept Neurosci, I-10125 Turin, Italy Univ Turin Turin Italy I-10125 siol, Dept Neurosci, I-10125 Turin, Italy Natl Inst Working Life, Ctr Musculoskeletal Res, Umea, Sweden Natl Inst Working Life Umea Sweden tr Musculoskeletal Res, Umea, Sweden Umea Univ, Div Sports Med, Dept Orthopaed Surg, Umea, Sweden Umea Univ Umea Sweden Div Sports Med, Dept Orthopaed Surg, Umea, Sweden
Titolo Testata:
NEUROSCIENCE LETTERS
fascicolo: 2, volume: 277, anno: 1999,
pagine: 95 - 98
SICI:
0304-3940(199912)277:2<95:ATFEAI>2.0.ZU;2-J
Fonte:
ISI
Lingua:
ENG
Keywords:
collision technique; cervical sympathetic nerve; sympathetic preganglionic neurones; post-impulse depression; spontaneous activity;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
6
Recensione:
Indirizzi per estratti:
Indirizzo: Passatore, M Univ Turin, Div Physiol, Dept Neurosci, Cso Raffaello 30, I-10125 Turin, Italy Univ Turin Cso Raffaello 30 Turin Italy I-10125 Turin, Italy
Citazione:
F. Hellstrom et al., "A technique for estimating activity in whole nerve trunks applied to the cervical sympathetic trunk, in the rabbit", NEUROSCI L, 277(2), 1999, pp. 95-98

Abstract

The changes in sympathetic outflow may be evaluated from the amplitude of the antidromic compound action potential (ACAP) according to the collision technique described by Douglas and Ritchie (Douglas, W.W. and Ritchie J.M.,A technique for recording functional activity in specific groups of medullated and non-medullated fibers in whole nerve trunks. J. Physiol., 138 (1957) 19-30). This technique was revised, taking into account the depressant action exerted by antidromic stimulation on sympathetic preganglionic neurones (SPNs). Cervical sympathetic nerve (CSN) of rabbits was used as experimental model. Stimulation frequencies of 0.2-0.5 Hz were found to be sufficiently low to avoid depressant actions on CSN spontaneous activity; they wereemployed to test the sensitivity of the technique during different experimental manoeuvres, such as changes in pulmonary-ventilation, baroreceptor unloading and arousal stimuli. In addition a procedure was devised to calibrate the ACAP amplitude: high frequency antidromic stimulation was used to induce a complete and transient inhibition of SPNs which allows to record theACAP maximum amplitude. ACAPs recorded in various experimental conditions can then be expressed as percentage of this value. (C) 1999 Elsevier Science Ireland Ltd. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 29/11/20 alle ore 16:07:14