[GavinMcG]

Though it's not that simple; isolated use of sleep deprivation can be an effective treatment for at least one mental health issue: https://mosaicscience.com/story/staying-awake-surprisingly-e...

[rerx]

Walker sounds quite sceptical of this story in his book, sleep deprivation may be effective as treatment in some cases, but could be a cause of depression in more cases.