Journal
NEUROSCIENCE RESEARCH
Volume 47, Issue 2, Pages 241-243Publisher
ELSEVIER SCI IRELAND LTD
DOI: 10.1016/S0168-0102(03)00170-6
Keywords
zopiclone; brotizolam; memory storage; sleep; hypnotics; sleep structure
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We compared the effect of a single bedtime dose of two short half-time hypnotics, brotizolam (0.25 mg) and zopiclone (7.5 mg), on memory storage during sleep in a double blind, placebo-controlled, three-way crossover design trial in eight healthy volunteers. Memory was evaluated using a standard word list free-recall test learned before the bedtime dose by the subjects, who were asked to remember the list the following morning. Digit Symbol Substitution Test revealed no residual sedation by brotizolam or zopiclone. Brotizolam did not affect the morning recall compared to placebo, but subjects remembered less words under zopiclone treatment, suggesting that this drug could affect memory storage during sleep. (C) 2003 Elsevier Ireland Ltd and the Japan Neuroscience Society. All rights reserved.
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