A member asked:

How many hours can you safely stay awake?

A doctor has provided 1 answer
Dr. Glenn Burns answered

Specializes in Emergency Medicine

Depends: Staying awake and being awake without cognitive deficits are not the same. Sleep deprivation causes marked reduction in mental acuity and judgement. The department of defense has studied this extensively, as have we in medicine due to the often insanely long hours (esp in trainees). The bottom line is we don't know because it varies, but you WILL have declining mental abilities by 24 hours.

Answered 12/31/2016

2.2k views

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