What is the feeling when you fall asleep called?
347040
There are actually quite a few different medical terms for this, depending on the severity.\n\nBut what typically happens for most of us when we say that our leg "fell asleep" is simply the loss of blood circulation. Usually this will occur when we sit, sleep, or otherwise position ourselves in a particularly odd way...such as lying on one's arm for a lengthy period of time.\n\nOften, I have just referred to it called simply as "arm/leg numbness." But the more severe varieties have far more professional medical terms associated with them; for example, if one's arm nerves are the cause of the trouble.
178740
Yes, that's why you feel tired.
853561
lack of oxygen in the brain. it's a signal that you're mind and body are tired and you need to sleep to recharge.
1095226
It's because when you're still for too long your circulation(blood flow through body) slows way down and doesn't get all through your extremities (arms and legs) properly.  That's what makes you feel kinda tingly. That's your body's way of telling you it's had enough of the computer chair and would like to go to bed.  Or get up and do some aerobics!
1117127
YOur eyes are closed.
791139
it means that you were asleep.
29653
Fear of sleep is called "somniphobia". (In response to the later answer, insomnia is the inability to sleep, not the fear of sleep.)
878817
I too have had my lady parts take a nap. . .definitely a strange feeling but everything seems to wake up nicely if I get up and move around. Usually only happens if I am sitting too long.  I personally don't worry about it, though it is usually a bit inconvenient (and funny too).
779308
Sleeping alto or not sleeping, crying over nothing, lethargic, feelings of sadness, suicidal thoughts, loss or gain in appetite.
856007
It's only been a few hours - everything's okay.  It will wear off.  I know it feels weird, and it's probably annoying as heck, but just be patient, and everything will be fine.  Maybe try taking a nap if you can, or do something else to take your mind off it.\n\nA few more hours and it'll be back to normal.
648494
Our body actually responds to it getting dark outside and releases a chemical called melatonin.  Melatonin is what gives you the sleepy feeling.  By the way if you have a hard time falling asleep, Melatonin is available at any vitamin and supplement store.  Its actually used alot for children with autism, to help them relax enough to fall asleep.
313916
There are always several answers.  One answer could be the threshold of your nerves.  Our nerves have a threshold inwhich the stimulus has to cross in order for our nerves to transmit the signal.  When you lay down to sleep, it could be that your mind is not distracted by life and your threshold has been lowered and thus your nerves are detecting any little thing and it feels like itching.\n\nAnother possible explaination could be that you have bed mites and they are biting you.  Not joking
864834
i passed out today... not pretty\nand when i fell i lost of my feeling then all of a sudden i was more relaxed than ive ever remembered myself ever being
155675
This is definitely a strange sensation -- you get up out of your seat, and all you feel from one foot is an uncomfortable tingling. Or you wake up in the middle of the night, and you can't move your arm at all. And then, as your body part "wakes up," the strange tingling intensifies. Just what is going on here?\n\nUsually, you feel this familiar sensation after you've been putting pressure on part of our body -- sitting on a foot, sleeping on an arm, etc. When you apply this pressure for a prolonged period of time, you actually cut off communication from your brain to parts of your body. The pressure squeezes nerve pathways so that the nerves can't transmit electrochemical impulses properly. Nerve impulses carry sensation information from nerve endings in the body to the brain, as well as instructions from the brain to the parts of the body. When you interfere with this transfer by squeezing the nerve pathways, you don't have full feeling in that body part, and your brain has trouble telling the body part what to do.\n\nThis pressure can also squeeze arteries, stopping them from carrying nutrients to body cells. Without these nutrients, the nerve cells may behave abnormally, which can further interfere with communicating bodily sensations.\n\nDue to both these factors, the information transmitted from the body part becomes somewhat jumbled, and the brain receives strange messages. Some nerve cells don't transmit any information and others start sending impulses erratically. This causes you to feel a strange tingling sensation, which actually serves an important function. Your foot falling asleep for 10 minutes doesn't pose any health threat, but if you were to cut off circulation for an extended period of time -- several hours -- you could suffer serious nerve damage. The initial tingling sensation tells you that you might want to readjust your position.\n\nOnce you do move your foot, stretch your legs, or roll over off your arm, the nerve impulses begin to flow properly again. You don't regain feeling right away, however. There is a certain amount of re-adjustment time before the nerves transmit impulses correctly again. This increases the intensity of the tingling, causing the familiar "pins and needles" sensation.\n\nIf this has ever happened to you, you know that there are actually a few distinct sensations you go through as your body part "wakes up." The tingling may be followed by a more uncomfortable burning sensation, before your body part finally returns to normal. This happens because the nerves in your body are made up of separate long nerve cells that carry different sorts of impulses. These nerve fibers have different surrounding structures. Some nerve fibers have thicker "insulation" around them and so take longer to begin transmitting impulses properly after they've been squeezed. The fibers that transmit pain and temperature information are relatively thin, so you feel the tingling situations pretty quickly. Motor control fibers are thinner than the ones carrying touch information, so you can move the body part before you've regained complete feeling in it. Eventually, all the nerve fibers return to normal and you regain full use of the sleeping body part.
665267
yes. i have been sleeping before when i felt hands on my back. it woke me up. when i did i fell off the bed because i was on my side on the very edge of the bed. think someone was holding me up?
913852
We refer it as "sleep".  For example, if we're horny, we're 'tired' and need to go 'take a nap'.  Any reference to going to bed and the kids bolt from the room almost instantly.
884217
falling asleep is knowing you will wake up soon. passing out is when you don't know when you will wake up and you don't know what happened. i passed out a few days  ago and my fiends said i didn't   eat and that before they know it i was on the ground out cold.