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Why do we feel sleepy, tired, and feel like we need to sleep more when we wake up? (Like, is there a special chemical in the brain that causes that?).

Are there any ways to wake up without feeling such things?

another 'Homo sapien'
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C. Shockley
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  • Possible duplicate of http://biology.stackexchange.com/questions/6829/why-do-we-feel-tired-if-we-sleep-excessively?rq=1 – another 'Homo sapien' Aug 15 '16 at 17:27
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    It is not tired by sleeping excessively, the question was why do we feel sleepy when we just wake up from being asleep. – C. Shockley Aug 15 '16 at 17:29
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    Let say you are hungry and I stop you in the middle of your lunch. With high probability... you will be still hungry %)) – Ilan Aug 15 '16 at 20:29
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    I don't know if anyone else experiences this, but for me I always wake up six hours after falling asleep (and that's usually as soon as my head touches the pillow). At that precise moment when I wake up, I'm wide awake. Any sooner I feel sleepy and any later I feel groggy. – FoldedChromatin Aug 16 '16 at 06:38
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    It is true I feel more sleepy in a vacation morning when I'd slept early, (with no factor of anxiety or stress) and normally rise on morning; than the end of an extremely busy, anxious, unslept night. – Always Confused Aug 28 '16 at 11:24
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    Probably it is not solely due to lack of sleep – Always Confused Aug 28 '16 at 11:28
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    maybe the brain stays in a state of "inertia" that take time to become fully alert. – Always Confused Aug 28 '16 at 11:29

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