Cardiac activity during sleep onset.
Psychophysiology
; 36(3): 298-306, 1999 May.
Article
en En
| MEDLINE
| ID: mdl-10352553
Alterations in a number of measures of cardiac activity were examined during sleep onset in 6 participants over 3 experimental nights. Each sleep onset was divided into four consecutive phases: wakefulness, mixed alpha and theta activity, stage 2 NREM sleep with arousals, and stable stage 2 sleep. The variables measured were heart rate (HR), respiratory sinus arrhythmia (RSA), pre-ejection period (PEP) and T-wave amplitude (TWA). Respiration rate (RR) was also measured. HR and RR were lower in stable Stage 2 sleep compared with wakefulness, whereas PEP, TWA and RSA did not change significantly. During the second and third phases of sleep onset, HR decreased at each transition into sleep and increased following each spontaneous arousal. This increase resolved rapidly, with a return to sleep levels by 12 beats after the arousal. HR changes are discussed with reference to RSA, PEP, TWA and the concept of a waking reflex.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Nivel de Alerta
/
Arritmia Sinusal
/
Respiración
/
Fases del Sueño
/
Sistema Nervioso Autónomo
/
Frecuencia Cardíaca
Límite:
Adolescent
/
Adult
/
Female
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Humans
/
Male
Idioma:
En
Revista:
Psychophysiology
Año:
1999
Tipo del documento:
Article
País de afiliación:
Australia
Pais de publicación:
Estados Unidos