Influence of ambient temperature on sleep characteristics and autonomic nervous control in healthy infants

Citation
P. Franco et al., Influence of ambient temperature on sleep characteristics and autonomic nervous control in healthy infants, SLEEP, 23(3), 2000, pp. 401-407
Citations number
54
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Neurosciences & Behavoir
Journal title
SLEEP
ISSN journal
0161-8105 → ACNP
Volume
23
Issue
3
Year of publication
2000
Pages
401 - 407
Database
ISI
SICI code
0161-8105(20000501)23:3<401:IOATOS>2.0.ZU;2-O
Abstract
Objective: To evaluate the influence of ambient temperature on infant's sle ep and cardiorespiratory parameters during sleep. Patients and method: 20 healthy infants with a median age of 11.5 weeks (ra nge 7 to 18 weeks) were recorded polygraphically for one night, They were e xposed to 3 different ambient temperatures (20 degrees C-25 degrees C-30 de grees C). Ambient and core temperatures were measured throughout the proced ure. Results: influence of ambient temperature was seen in: Respiratory parameters: The frequency of central apneas increased significa ntly with increasing temperatures in REM sleep, but not in NREM sleep. Heart rate (HR) parameters and HR spectral analysis: Elevation of temperatu re was characterized by significantly higher basal HR, shorter RR intervals , and lower parasympathetic activity in REM and NREM sleep. Saturation in oxygen: During total sleep time, rise in temperature induced a decrease in basal oxygen saturation. During REM sleep, a greater frequenc y of oxygen saturation drops was associated with central apneas. Core temperature: With increasing ambient temperature, the rise of rectal t emperature was mild. Despite this lack of significant increase, similar res ults were found when sleep and cardiorespiratory parameters were evaluated according to rectal temperatures. Conclusion: Changes in ambient temperatures associated with mild increases in body temperature significantly modified cardiorespiratory parameters and autonomic controls in healthy infants. The changes associated with increas es in temperature were mainly seen during REM sleep.