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Titolo:
Effects of bright light and melatonin on sleep propensity, temperature, and cardiac activity at night
Autore:
Burgess, HJ; Sletten, T; Savic, N; Gilbert, SS; Dawson, D;
Indirizzi:
Univ S Australia, Ctr Sleep Res, Woodville, SA 5011, Australia Univ S Australia Woodville SA Australia 5011 oodville, SA 5011, Australia
Titolo Testata:
JOURNAL OF APPLIED PHYSIOLOGY
fascicolo: 3, volume: 91, anno: 2001,
pagine: 1214 - 1222
SICI:
8750-7587(200109)91:3<1214:EOBLAM>2.0.ZU;2-E
Fonte:
ISI
Lingua:
ENG
Soggetto:
RESPIRATORY SINUS ARRHYTHMIA; HEART-RATE; IMPEDANCE CARDIOGRAPHY; ARTERIAL-PRESSURE; DAYTIME MELATONIN; SPECTRAL-ANALYSIS; BINDING-SITES; PHASE; VARIABILITY; ORIGINS;
Keywords:
heart rate variability; respiratory; sympathetic;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
36
Recensione:
Indirizzi per estratti:
Indirizzo: Burgess, HJ Rush Presbyterian St Lukes Med Ctr, Biol Rhythms Res Lab, 1645W Jackson Blvd,Suite 425, Chicago, IL 60612 USA Rush Presbyterian St LukesMed Ctr 1645 W Jackson Blvd,Suite 425 Chicago IL USA 60612
Citazione:
H.J. Burgess et al., "Effects of bright light and melatonin on sleep propensity, temperature, and cardiac activity at night", J APP PHYSL, 91(3), 2001, pp. 1214-1222

Abstract

Melatonin increases sleepiness, decreases core temperature, and increases peripheral temperature in humans. Melatonin may produce these effects by activating peripheral receptors or altering autonomic activity. The latter hypothesis was investigated in 16 supine subjects. Three conditions were created by using bright light and exogenous melatonin: normal endogenous, suppressed, and pharmacological melatonin levels. Data during wakefulness from 1.5 h before to 2.5 h after each subject's estimated melatonin onset (wake time +/- 14 h) were analyzed. Respiratory sinus arrhythmia (cardiac parasympathetic activity) and preejection period (cardiac sympathetic activity) didnot vary among conditions. Pharmacological melatonin levels significantly decreased systolic blood pressure [5.75 +/- 1.65 (SE) mmHg] but did not significantly change heart rate. Suppressed melatonin significantly increased rectal temperature (0.27 +/- 0.06 degreesC), decreased foot temperature (1.98 +/- 0.70 degreesC), and increased sleep onset latency (5.53 +/- 1.87 min). Thus melatonin does not significantly alter cardiac autonomic activity and instead may bind to peripheral receptors in the vasculature and heart. Furthermore, increases in cardiac parasympathetic activity before normal nighttime sleep cannot be attributed to the concomitant increase in endogenousmelatonin.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 26/01/20 alle ore 00:59:58