Show Summary Details
Page of

Normal sleep 

Normal sleep
Normal sleep

Dr Sue Wilson

and Prof. David J. Nutt

Page of

PRINTED FROM OXFORD MEDICINE ONLINE ( © Oxford University Press, 2020. All Rights Reserved. Under the terms of the licence agreement, an individual user may print out a PDF of a single chapter of a title in Oxford Medicine Online for personal use (for details see Privacy Policy and Legal Notice).

date: 30 March 2020

- Sleep is essential to normal brain function

- Loss of sleep can result in changes in mood, cognitive impairment, and abnormal hormone rhythms

- Most adults sleep for between 7 and 8 h a night; adults sleeping <6 h are likely to report that they do not get enough sleep and that they are more dissatisfied with life

- The sleep–wake cycle is controlled by two separate but interacting processes: the circadian process and the homeostatic or recovery process

- The typical sleep pattern consists of 4 or 5 cycles of quiet sleep, alternating with paradoxical, or rapid-eye-movement (REM) sleep

- Quiet sleep is often referred to as non-REM (NREM) and is divided further into four stages

Access to the complete content on Oxford Medicine Online requires a subscription or purchase. Public users are able to search the site and view the abstracts for each book and chapter without a subscription.

Please subscribe or login to access full text content.

If you have purchased a print title that contains an access token, please see the token for information about how to register your code.

For questions on access or troubleshooting, please check our FAQs, and if you can't find the answer there, please contact us.