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Multiple Sleep Latency Test (MSLT) can objectively evaluate daytime sleepiness. When used as diagnostic prosedure of central hypersomnia it should be done during the day after polysomnographically documented adequate night sleep, which lasts at least six hours and after two weeks of regular sleep. (Carscadon & Dement, 1982, American sleep disorders association, 1992) (ICSD-2, 2005). Evaluation of MSLT starts 1,5-3 hours after morning awakening and consists of 5, or at least 4 records of polysomnography, each lasting 20minutes (Littner et al., 2005). Latency of sleep and occurence and latency of REM sleep is in each record noted. A mean sleep latency below five minutes is generally considered. | PSYCHIATRIC DISORDERS -WORLDWIDE ADVANCES Edited by Toru Uehara INTECHWEB.ORG Psychiatric Disorders - Worldwide Advances Edited by Toru Uehara Published by InTech Janeza Trdine 9 51000 Rijeka Croatia Copyright 2011 InTech All chapters are Open Access articles distributed under the Creative Commons Non Commercial Share Alike Attribution 3.0 license which permits to copy distribute transmit and adapt the work in any medium so long as the original work is properly cited. After this work has been published by InTech authors have the right to republish it in whole or part in any publication of which they are the author and to make other personal use of the work. Any republication referencing or personal use of the work must explicitly identify the original source. Statements and opinions expressed in the chapters are these of the individual contributors and not necessarily those of the editors or publisher. No responsibility is accepted for the accuracy of information contained in the published articles. The publisher assumes no responsibility for any damage or injury to persons or property arising out of the use of any materials instructions methods or ideas contained in the book. Publishing Process Manager Ivana Zec Technical Editor Teodora Smiljanic Cover Designer Jan Hyrat Image Copyright Oleg Golovnev 2011. Used under license from Shutterstock.com First published September 2011 Printed in Croatia A free online edition of this book is available at www.intechopen.com Additional hard copies can be obtained from orders@intechweb.org Psychiatric Disorders - Worldwide Advances Edited by Toru Uehara p. cm. ISBN 978-953-307-833-5 ikrrr iJ OPEN ACCESS INI Cvn PUBLISHER INTECH open free online editions of InTech Books and Journals can be found at .
