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Titolo:
Modulation of the human nociceptive flexion reflex across the cardiac cycle
Autore:
Edwards, L; Ring, C; McIntyre, D; Carroll, D;
Indirizzi:
Univ Birmingham, Sch Sport & Exercise Sci, Birmingham B15 2TT, W Midlands,England Univ Birmingham Birmingham W Midlands England B15 2TT W Midlands,England
Titolo Testata:
PSYCHOPHYSIOLOGY
fascicolo: 4, volume: 38, anno: 2001,
pagine: 712 - 718
SICI:
0048-5772(200107)38:4<712:MOTHNF>2.0.ZU;2-O
Fonte:
ISI
Lingua:
ENG
Soggetto:
MIDBRAIN PERIAQUEDUCTAL GRAY; DECREASED PAIN PERCEPTION; ARTERIAL BLOOD-PRESSURE; BARORECEPTOR STIMULATION; CARDIOVASCULAR-RESPONSES; FUNCTIONAL-ORGANIZATION; CAROTID BARORECEPTORS; INDUCED ANALGESIA; HYPERTENSION; ACTIVATION;
Keywords:
baroreflex; blood pressure; cardiac cycle time; descending pain modulation; hypertension; nociceptive flexion reflex;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Social & Behavioral Sciences
Life Sciences
Citazioni:
61
Recensione:
Indirizzi per estratti:
Indirizzo: Edwards, L Univ Birmingham, Sch Sport & Exercise Sci, Birmingham B15 2TT, W Midlands,England Univ Birmingham Birmingham W Midlands England B15 2TT ,England
Citazione:
L. Edwards et al., "Modulation of the human nociceptive flexion reflex across the cardiac cycle", PSYCHOPHYSL, 38(4), 2001, pp. 712-718

Abstract

Carotid baroreceptor stimulation has been shown to dampen pain. This studytested, in 40 normotensive adults, the hypothesis that pain is lower during systole when arterial baroreceptor stimulation is maximal than diastole when stimulation is minimal. The sural nerve was stimulated electrocutaneously to obtain a nociceptive flexion reflex (NFR) threshold, and then stimulation was delivered for 28 trials at 100% NFR threshold at seven intervals after the R-wave. Nociceptive responding was indexed by electromyographic (EMG) activity elicited in the biceps femoris. Significant variations in EMG activity occurred across the cardiac cycle, with less activity midcycle. indicating that the NFR response was attenuated during systole compared to diastole. Stimulation of baroreceptors by natural changes in blood pressure during the cardiac cycle dampened nociception, and accordingly, the data support the arterial baroreflex mechanism of hypertensive hypoalgesia.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 15/07/20 alle ore 05:29:47