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Titolo:
Static handgrip exercise modifies arterial baroreflex control of vascular sympathetic outflow in humans
Autore:
Kamiya, A; Michikami, D; Fu, Q; Niimi, Y; Iwase, S; Mano, T; Suzumura, A;
Indirizzi:
Nagoya Univ, Environm Med Res Inst, Dept Auton Neurosci, Chikusa Ku, Nagoya, Aichi 4648601, Japan Nagoya Univ Nagoya Aichi Japan 4648601 a Ku, Nagoya, Aichi 4648601, Japan
Titolo Testata:
AMERICAN JOURNAL OF PHYSIOLOGY-REGULATORY INTEGRATIVE AND COMPARATIVE PHYSIOLOGY
fascicolo: 4, volume: 281, anno: 2001,
pagine: R1134 - R1139
SICI:
0363-6119(200110)281:4<R1134:SHEMAB>2.0.ZU;2-F
Fonte:
ISI
Lingua:
ENG
Soggetto:
DYNAMIC EXERCISE; CAROTID BAROREFLEX; NERVE ACTIVITY; AFFERENT-FIBERS; MUSCLE ISCHEMIA; BLOOD-PRESSURE; CAT; RESPONSIVENESS; MODULATION; REFLEX;
Keywords:
arterial pressure; microneurography; muscle sympathetic nerve activity; pressor response;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
35
Recensione:
Indirizzi per estratti:
Indirizzo: Kamiya, A Nagoya Univ, Environm Med Res Inst, Dept Auton Neurosci, ChikusaKu, Furo Cho, Nagoya, Aichi 4648601, Japan Nagoya Univ Furo Cho Nagoya Aichi Japan 4648601 i 4648601, Japan
Citazione:
A. Kamiya et al., "Static handgrip exercise modifies arterial baroreflex control of vascular sympathetic outflow in humans", AM J P-REG, 281(4), 2001, pp. R1134-R1139

Abstract

To examine effects of static exercise on the arterial baroreflex control of vascular sympathetic nerve activity, 22 healthy male volunteers performed2 min of static handgrip exercise at 30% of maximal voluntary force, followed by postexercise circulatory arrest (PE-CA). Microneurographic recordingof muscle sympathetic nerve activity (MSNA) was made with simultaneous recording of arterial pressure (Portapres). The relationship between MSNA and diastolic arterial pressure was calculated for each condition and was defined as the arterial baroreflex function. There was a close relationship between MSNA and diastolic arterial pressure in each subject at rest and duringstatic exercise and PE-CA. The slope of the relationship significantly increased by >300% during static exercise (P< 0.001), and the x-axis intercept(diastolic arterial pressure level) increased by 13 mmHg during exercise (P< 0.001). These alterations in the baroreflex relationship were completelymaintained during PE-CA. It is concluded that static handgrip exercise is associated with a resetting of the operating range and an increase in the reflex gain of the arterial barorelex control of MSNA.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 31/10/20 alle ore 00:35:40