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Titolo:
Cardiovascular control and plasma catecholamines during rest and mental stress: effects of posture
Autore:
Tulen, JHM; Boomsma, F; Veld, AJMI;
Indirizzi:
Univndssp Rotterdam Dijkzigt, Dept Psychiat, NL-3015 GD Rotterdam, Netherla Univ Hosp Rotterdam Dijkzigt Rotterdam Netherlands NL-3015 GD , Netherla Erasmus Univ, NL-3015 GD Rotterdam, Netherlands Erasmus Univ Rotterdam Netherlands NL-3015 GD GD Rotterdam, Netherlands Univtherlandsterdam Dijkzigt, Dept Internal Med 1, NL-3015 GD Rotterdam, Ne Univ Hosp Rotterdam Dijkzigt Rotterdam Netherlands NL-3015 GD terdam, Ne
Titolo Testata:
CLINICAL SCIENCE
fascicolo: 6, volume: 96, anno: 1999,
pagine: 567 - 576
SICI:
0143-5221(199906)96:6<567:CCAPCD>2.0.ZU;2-N
Fonte:
ISI
Lingua:
ENG
Soggetto:
BLOOD-PRESSURE; SPECTRAL-ANALYSIS; HEMODYNAMIC-RESPONSES; PSYCHOLOGICAL STRESS; REACTIVITY; CHALLENGE; CIRCULATION; STABILITY;
Keywords:
body posture; cardiovascular variability; mental stress; plasma catecholamines;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
38
Recensione:
Indirizzi per estratti:
Indirizzo: Tulen, JHM UnivGDosp Rotterdam Dijkzigt, Dept Psychiat, Dr Molewaterplein 40, NL-3015 Univ Hosp Rotterdam Dijkzigt Dr Molewaterplein 40 Rotterdam Netherlands NL-3015 GD
Citazione:
J.H.M. Tulen et al., "Cardiovascular control and plasma catecholamines during rest and mental stress: effects of posture", CLIN SCI, 96(6), 1999, pp. 567-576

Abstract

In order to understand the complex autonomic adjustments that occur du ri ng the psychological challenges of normal daily life, autonomic responses to psychological stress were studied by evaluating the effects of body posture on various indices of sympathetic and parasympathetic regulation during performance of a psychological task. Twelve male subjects were studied in various postures (supine, sitting and standing), and during performance of the Colour Word Test (CWT) when sitting and then when standing. This procedure was subsequently repeated in reverse order (first standing and then sitting) after 15 min of supine rest. Blood samples for assay of plasma catecholamines were obtained before and during each CWT. Spectral analysis of beat-to-beat variations of heart rate (HR) and blood pressure (BP) was applied in order to obtain noninvasive indices of sympathetic and parasympathetic regulation. HR, diastolic BP, mid-frequency band power (0.07-0. 14 Hz) of HRand systolic BP, and plasma adrenaline and noradrenaline concentrations showed significant increases when changing from supine to sitting to standingposture, whereas high-frequency band power (0.15-0.50 Hz) of HR decreased in a posture-dependent fashion. In the sitting position, the CWT caused significant increases in HR, BP and plasma adrenaline levels, and decreased HR,and BP variability indices. In the standing posture, the CWT responses differed significantly from those during sitting for HR (a mild decrease during standing), high-frequency band power of HR (decreased more while sitting), high-frequency band power of BP (decreased more while standing), and plasma adrenaline responses (larger during sitting). Posture-related differential effects were observed on indices of sympatho-adrenomedullary activation during performance of a psychological challenge, whereas indices of parasympathetic activity indicated primarily less vagolytic effects when the task was performed in the standing posture. Our findings therefore underline thecomplexity of the adjustments that occur in neurohumoral and haemodynamic parameters during the psychological challenges of daily life.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 07/07/20 alle ore 05:46:33