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Daytime drowsiness and response to human stimuli in a child with severe intellectual and physical disabilities: Observation on eye-blink and daytime napping

This article presents a case study that focuses on daytime drowsiness in a child with severe intellectual and physical disabilities. Staying awake in the daytime is important to the establishment of 24-h sleep-wake rhythm. This study, which recorded a child’s daytime napping and his blink response to human stimuli, showed that an increase in the child’s blink response to his caregiver preceded an increase in his ability to stay awake during the daytime. It is suggested, then, that children’s responding to human stimuli is a key factor in their establishment of a 24-h sleep-wake rhythm.