Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Why do I feel so hyperactive and fidgety after not sleeping much?

  1. Mar 15, 2004 #1
    Last night I got to bed around 3:00am and I woke up at about 7:30. Today, I feel totally hyperactive and I can't sit still without fidgeting to an insane degree. Can anyone explain why? Did I tap into some sort of reserve energy source and it get let out in massive amounts?
  2. jcsd
  3. Mar 15, 2004 #2


    User Avatar
    Science Advisor

    I think it's because you release stress hormones after sleep deprivation, one of them being cortisol. I know exogenous cortisol in the form of oral hydrocortisone or prednisone given for poison ivey, asthma etc. will cause people to have insomnia, jitteryness, and even steroid psycosis (non anabolic steroid psycosis). It's probably why sometimes after not sleeping for over a day, it's hard to fall asleep. However, chronic overproduction of cortisol (versus the transitory pulse increase) has the opposite effect, sedation and fatigue (found in those with Cushing's syndrome).
    Last edited: Mar 15, 2004
  4. Mar 15, 2004 #3
    Hmm, I have no prior knowledge of any of those hormones, but I'll accept it.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook