Take the 2-minute tour ×
Biology Stack Exchange is a question and answer site for biology researchers, academics, and students. It's 100% free, no registration required.

And how do we know whether they do or not?


If sleep is a physiological need, it seems weird that we become unable to fulfill on demand even in the absence of any obvious physical issues. We would all probably would like to be able to fall asleep on demand on a long flight and we all know this can be hard even when we are tired.

Thus, my question is whether this is a mostly human dysfunction or a common animal property.

share|improve this question
Cortisol is often used to measure stress levels in at least mammals and birds, and it is linked to insomnia in humans. I would therefore guess that stress-induced cortisol can cause insomnia in these groups of animals as well. –  fileunderwater May 30 '13 at 22:06
Commenting on the how, you can wire animals using EEG as you do with humans to see their brain activity. Provided you have a profile of the different patterns that correlates to different stages of sleep. –  dayuloli Jun 2 '13 at 10:06

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Browse other questions tagged or ask your own question.