The familiar cry in the night, followed by a blind shuffle to the crib, a feeding, a diaper change, and a final retreat back into oblivion every hour on the hour. Such is the sleep pattern of most new parents, who report feeling more exhausted in the morning than when they went to bed the night before.
Now, in the first study of its kind, Prof. Avi Sadeh and a team of researchers from Tel Aviv University's School of Psychological Sciences explain why interrupted sleep can be as physically detrimental as no sleep at all. In the study, published in the journal Sleep Medicine, Prof. Sadeh and his colleagues Michal Kahn, Shimrit Fridenson, Reut Lerer and Yair Ben-Haim establish a causal link between interrupted sleep patterns and compromised cognitive abilities, shortened attention spans, and negative moods. The researchers discovered that interrupted sleep is equivalent to no more than four consecutive hours of sleep.
"The sleep of many parents is often disrupted by external sources such as a crying baby demanding care during the night. Doctors on call, who may receive several phone calls a night, also experience disruptions," said Prof. Sadeh. "These night wakings could be relatively short only five to ten minutes but they disrupt the natural sleep rhythm. The impact of such night wakings on an individual's daytime alertness, mood, and cognitive abilities had never been studied. Our study is the first to demonstrate seriously deleterious cognitive and emotional effects."
Putting Mom and Dad in a bad mood
"In the process of advising these parents, it struck me that the role of multiple night wakings had never been systematically assessed," said Prof. Sadeh, who directs a sleep clinic at TAU, where he advises exhausted and desperate parents on how to cope with their children's persistent night wakings. "Many previous studies had shown an association, but none had established a causal link. Our study demonstrates
|Contact: George Hunka|
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