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Titolo:
BIDIRECTIONAL AUGMENTATION OF HEART-RATE REGULATION BY AUTONOMIC NERVOUS-SYSTEM IN RABBITS
Autore:
KAWADA T; IKEDA Y; SUGIMACHI M; SHISHIDO T; KAWAGUCHI O; YAMAZAKI T; ALEXANDER J; SUNAGAWA K;
Indirizzi:
NATL CARDIOVASC CTR,RES INST,DEPT CARDIOVASC DYNAM,5-7-1 FUJISHIRODAISUITA OSAKA 565 JAPAN NATL CARDIOVASC CTR,RES INST,DEPT CARDIAC PHYSIOL SUITA OSAKA 565 JAPAN VANDERBILT UNIV,DEPT BIOMED ENGN NASHVILLE TN 37235
Titolo Testata:
American journal of physiology. Heart and circulatory physiology
fascicolo: 1, volume: 40, anno: 1996,
pagine: 288 - 295
SICI:
0363-6135(1996)40:1<288:BAOHRB>2.0.ZU;2-Q
Fonte:
ISI
Lingua:
ENG
Soggetto:
SYMPATHETIC-PARASYMPATHETIC INTERACTIONS; CAROTID-SINUS BAROREFLEX; ANESTHETIZED DOGS; VAGAL-STIMULATION; NEUROPEPTIDE-Y; AORTIC BARORECEPTORS; NOREPINEPHRINE; VARIABILITY; OVERFLOW; NODE;
Keywords:
SYSTEMS ANALYSIS; GAUSSIAN WHITE NOISE; INTERACTION; TRANSFER FUNCTION; NERVE STIMULATION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
35
Recensione:
Indirizzi per estratti:
Citazione:
T. Kawada et al., "BIDIRECTIONAL AUGMENTATION OF HEART-RATE REGULATION BY AUTONOMIC NERVOUS-SYSTEM IN RABBITS", American journal of physiology. Heart and circulatory physiology, 40(1), 1996, pp. 288-295

Abstract

Although the characteristics of the static interaction between the sympathetic and parasympathetic nervous Systems in regulating heart rate(HR) have been well established, how the dynamic interaction modulates the HR response remains unknown. We therefore investigated dynamic interaction by estimating the transfer function from nerve stimulation to HR using a band-limited Gaussian white-noise technique. The transfer function relating dynamic sympathetic stimulation to HR had characteristics of a second-order low-pass filter. Simultaneous tonic vagal stimulation at 5 and 10 Hz increased gain of the transfer function by 55.0 +/- 40.1 and 80.7 +/- 50.5%, respectively (P < 0.05). The transfer function from dynamic vagal stimulation to HR had characteristics of afirst-order low-pass filter. Simultaneous tonic sympathetic stimulation at 5 and 10 Hz increased the gain by 18.2 +/- 17.9 and 24.1 +/- 18.0%, respectively (P < 0.05). Thus interaction augmented dynamic gain bidirectionally, even though it affected mean HR antagonistically. By virtue of this interaction, the autonomic nervous system appears to extend its dynamic range of operation.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 27/11/20 alle ore 01:57:31