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Titolo:
NEURAL ARC OF BAROREFLEX OPTIMIZES DYNAMIC PRESSURE REGULATION IN ACHIEVING BOTH STABILITY AND QUICKNESS
Autore:
IKEDA Y; KAWADA T; SUGIMACHI M; KAWAGUCHI O; SHISHIDO T; SATO T; MIYANO H; MATSUURA W; 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 CARDIOVASC DYNAM SUITA OSAKA 565 JAPAN VANDERBILT UNIV,DEPT BIOMED ENGN NASHVILLE TN 37235
Titolo Testata:
American journal of physiology. Heart and circulatory physiology
fascicolo: 3, volume: 40, anno: 1996,
pagine: 882 - 890
SICI:
0363-6135(1996)40:3<882:NAOBOD>2.0.ZU;2-R
Fonte:
ISI
Lingua:
ENG
Soggetto:
CAROTID-SINUS BAROREFLEX; BLOOD-FLOW DISTRIBUTION; VASCULAR CAPACITANCE; BARORECEPTOR REFLEX; ANESTHETIZED DOGS; ARTERIAL-PRESSURE; NERVE STIMULATION; HEART-RATE; EXERCISE; RESISTANCE;
Keywords:
TRANSFER FUNCTION; WHITE NOISE TECHNIQUE; SYMPATHETIC NERVOUS SYSTEM; RABBITS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
29
Recensione:
Indirizzi per estratti:
Citazione:
Y. Ikeda et al., "NEURAL ARC OF BAROREFLEX OPTIMIZES DYNAMIC PRESSURE REGULATION IN ACHIEVING BOTH STABILITY AND QUICKNESS", American journal of physiology. Heart and circulatory physiology, 40(3), 1996, pp. 882-890

Abstract

The baroreflex loop consists of a fast neural are and a slow mechanical arc. We hypothesized that the neural baroreflex are compensates theslow mechanical response and thus improves the quality of blood pressure regulation. We estimated the open-loop transfer characteristics ofthe neural baroreflex are (H-n), i.e., from carotid sinus pressure tosympathetic nerve activity (SNA), and that of the effective peripheral baroreflex are (H-p), i.e., from SNA to arterial pressure, in anesthetized rabbits. The gain of H-n was constant below 0.12 +/- 0.057 Hz and increased with a slope of 6.1 +/- 0.06 dB/octave above its frequency up to 1 Hz. In contrast, the gain of H-p was constant below 0.071 +/- 0.03 Hz and decreased with a slope of -11.0 +/- 1.48 dB/octave abovethe frequency. These data indicate that H-n accelerates slow peripheral responses in the frequency range of 0.1-1 Hz. Although too much acceleration in the high-frequency range could result in instability of the system, numerical analysis of the closed-loop baroreflex response indicated that the neural are optimized arterial pressure regulation inachieving both stability and quickness.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 03/12/20 alle ore 05:16:49