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Titolo:
TRANSFER-FUNCTION ANALYSIS OF CENTRAL ARC OF AORTIC BARORECEPTOR REFLEX IN RABBITS
Autore:
KUBO T; IMAIZUMI T; HARASAWA Y; ANDO SI; TAGAWA T; ENDO T; SHIRAMOTO M; TAKESHITA A;
Indirizzi:
KYUSHU UNIV,FAC MED,ANGIOCARDIOL RES INST,HIGASHI KU,3-1-1 MAIDASHI FUKUOKA 81282 JAPAN KYUSHU UNIV,FAC MED,ANGIOCARDIOL RES INST,HIGASHI KU FUKUOKA 81282 JAPAN KYUSHU UNIV,FAC MED,CARDIOVASC CLIN,HIGASHI KU FUKUOKA 81282 JAPAN
Titolo Testata:
American journal of physiology. Heart and circulatory physiology
fascicolo: 3, volume: 39, anno: 1996,
pagine: 1054 - 1062
SICI:
0363-6135(1996)39:3<1054:TAOCAO>2.0.ZU;2-1
Fonte:
ISI
Lingua:
ENG
Soggetto:
CAROTID-SINUS BARORECEPTORS; SYMPATHETIC-NERVE RHYTHM; BAROREFLEX CONTROL; CARDIOVASCULAR CONTROL; HYPERTENSION; ANESTHESIA; DISCHARGE; PRESSURE;
Keywords:
FREQUENCY ANALYSIS; NERVE STIMULATION; RENAL SYMPATHETIC NERVE ACTIVITY; SYSTEM ANALYSIS; SYSTEM IDENTIFICATION; WHITE-NOISE TECHNIQUE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
28
Recensione:
Indirizzi per estratti:
Citazione:
T. Kubo et al., "TRANSFER-FUNCTION ANALYSIS OF CENTRAL ARC OF AORTIC BARORECEPTOR REFLEX IN RABBITS", American journal of physiology. Heart and circulatory physiology, 39(3), 1996, pp. 1054-1062

Abstract

While electrically stimulating the aortic depressor nerve (ADN) pseudorandomly, we recorded renal sympathetic nerve activity (RSNA) and systemic arterial pressure (SAP) in 19 alpha-chloralose-anesthetized rabbits with sinoaortic denervation. From the recorded signals, we determined the transfer functions from ADN stimulation by a pseudorandom binary sequence to RSNA [H-CMD . RSNA(f)] and to SAP [H-CMD . SAP(f)] The modulus of H-CMD . RSNA(f) was flat over 0.0122-0.8 Hz, whereas the phase lag increased linearly with frequency Thus the central transduction appeared not to modify the relative amplitude of the signals from the baroreflex afferents but to provide a fixed time delay (similar to 400 ms). In contrast, the modulus of H-CMD . SAP(f) decreased precipitously toward high frequencies, and the degree of the phase lag was larger than that of H-CMD . RSNA(f) We conclude that 1) the transfer property of the central are does not significantly modify the relative amplitude of the frequency components of the baroreflex afferents but provides a fixed time delay and 2) the frequency independence of the modulus of the transfer property is not preserved when the analysis is extended to SAP.

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Documento generato il 15/07/20 alle ore 12:39:28