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Franco, P. et al.

Franco, Scaillet, Valente, Chabanski, Groswasser, Kahn,

Ambient temperature is associated with changes in infants' arousability from sleep.

STUDY OBJECTIVE: To evaluate the influence of ambient temperature on infants' arousability from sleep. DESIGN: Two groups of healthy infants with a median age of 11 weeks were recorded polygraphically during one night: 31 infants were studied at 24 degreesC and 31 infants at 28 degreesC. To determine their arousal thresholds, the infants were exposed to white noises of increasing intensities during REM and NREM sleep. Arousal thresholds were defined by the auditory stimuli needed to induce arousals. SETTING: N/A. PATIENTS or PARTICIPANTS: N/A. INTERVENTIONS: N/A. MEASUREMENTS and RESULTS: The arousal thresholds decreased across the night in the infants sleeping at 24 degreesC (p=.017). The finding was not found for the infants sleeping at 28 degreesC. When analyzing the arousal responses according to time of the night, it was found that the auditory thresholds were significantly higher at 28 degreesC than at 24 degreesC between 03:00 hr and 06:00 hr (p=.003). These findings were only seen in REM sleep. CONCLUSION: High ambient temperature could add to the difficulty to arouse from REM sleep in the late hours of the night.[1]

References

Ambient temperature is associated with changes in infants' arousability from sleep. Franco, P., Scaillet, S., Valente, F., Chabanski, S., Groswasser, J., Kahn, A. Sleep. (2001) [Pubmed]

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