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Titolo:
Hypnotic manipulation of effort sense during dynamic exercise: cardiovascular responses and brain activation
Autore:
Williamson, JW; McColl, R; Mathews, D; Mitchell, JH; Raven, PB; Morgan, WP;
Indirizzi:
Univ Texas, SW Med Ctr, SW Allied Hlth Sci Sch, Dept Phys Therapy, Dallas,TX 75235 USA Univ Texas Dallas TX USA 75235 ch, Dept Phys Therapy, Dallas,TX 75235 USA Univ Texas, SW Med Ctr, Dept Radiol, Dallas, TX 75235 USA Univ Texas Dallas TX USA 75235 Med Ctr, Dept Radiol, Dallas, TX 75235 USA Univ Texas, SW Med Ctr, Moss Heart Ctr, Dallas, TX 75235 USA Univ Texas Dallas TX USA 75235 Ctr, Moss Heart Ctr, Dallas, TX 75235 USA Univ N Texas, Hlth Sci Ctr, Dept Integrat Physiol, Ft Worth, TX 76107 USA Univ N Texas Ft Worth TX USA 76107 tegrat Physiol, Ft Worth, TX 76107 USA Univ Wisconsin, Dept Kinesiol, Madison, WI 53706 USA Univ Wisconsin Madison WI USA 53706 Dept Kinesiol, Madison, WI 53706 USA
Titolo Testata:
JOURNAL OF APPLIED PHYSIOLOGY
fascicolo: 4, volume: 90, anno: 2001,
pagine: 1392 - 1399
SICI:
8750-7587(200104)90:4<1392:HMOESD>2.0.ZU;2-G
Fonte:
ISI
Lingua:
ENG
Soggetto:
INSULAR CORTEX; ANTERIOR CINGULATE; RAT; PATHWAYS; HUMANS;
Keywords:
human; single-photon-emission computed tomography; magnetic resonance imaging; autonomic nervous system;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
38
Recensione:
Indirizzi per estratti:
Indirizzo: Williamson, JW Univ Texas, SW Med Ctr, SW Allied Hlth Sci Sch, Dept Phys Therapy, 5323 Harry Hines Blvd, Dallas, TX 75235 USA Univ Texas 5323 Harry Hines Blvd Dallas TX USA 75235 35 USA
Citazione:
J.W. Williamson et al., "Hypnotic manipulation of effort sense during dynamic exercise: cardiovascular responses and brain activation", J APP PHYSL, 90(4), 2001, pp. 1392-1399

Abstract

The purpose of this investigation was to hypnotically manipulate effort sense during dynamic exercise and determine whether cerebral cortical structures previously implicated in the central modulation of cardiovascular responses were activated. Six healthy volunteers (4 women, 2 men) screened for high hypnotizability were studied on 3 separate days during constant-load exercise under three hypnotic conditions involving cycling on a 1) perceived level grade, 2) perceived downhill grade, and 3) perceived uphill grade. Ratings of perceived exertion (RPE), heart rate (HR), blood pressure (BP), and regional cerebral blood flow (rCBF) distributions for several sites were compared across conditions using an analysis of variance. The suggestion ofdownhill cycling decreased both the RPE [from 13 +/- 2 to 11 +/- 2 (SD) units; P < 0.05] and rCBF in the left insular cortex and anterior cingulate cortex, but it did not alter exercise HR or BP responses. Perceived uphill cycling elicited significant increases in RPE (from 13 +/- 2 to 14 +/- 1 units), HR (+16 beats/min), mean BP (+7 mmHg), right insular activation (+7.7 /- 4%), and right thalamus activation (+9.2 +/- 5%). There were no differences in rCBF for leg sensorimotor regions across conditions. These findingsshow that an increase in effort sense during constant-load exercise can activate both insular and thalamic regions and elevate cardiovascular responses but that decreases in effort sense do not reduce cardiovascular responses below the level required to sustain metabolic needs.

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Documento generato il 25/01/20 alle ore 16:03:33