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Abstract
Sleep patterns were investigated in 29 insomniacs and 22 controls selected from a
large sample of elderly residents of an urban community. According to sleep logs kept
for a mean of 14.7 days, insomniacs took longer to fall asleep and stayed awake longer
when they woke at night. In 14 insomniacs and 8 controls, wrist movements were monitored
with a portable instrument. A circadian rhythm of motor activity was found in both
groups, with some notable differences. Insomniacs were more active during periods
of bedrest, and their mean daily rest-activity pattern—representing mean activity
at equivalent times of day—was flatter. The mean level of activity over the entire
experiment was similar in both groups. Insomnia in many elderly persons is thus associated
with diffusion of activity over the 24-hr day, leaving bedrest periods only partially
filled by rest or sleep.
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Article info
Publication history
Received in revised form:
July 25,
1992
Received:
March 10,
1992
Identification
Copyright
© 1992 Published by Elsevier Inc.