What triggers turning over in bed?

I'm like a washing machine in bed, heres me thinking it was so I could have a bad hair day when I wake up.

You sleep in awkward position for a while, blood flow is reduced in some areas, the tissues in these areas are neglected from oxygen and only get a bit, so its probably a trigger for a hormone to be created. This will whizz to the brain and it'll be an automatic response maybe, either that or it'll send an impulse up the nervous system to the node thing in the spine and that'd react naturally without thought.

Simply to stop your arm or something dying from blood restriction in the night :)

i think it to do with breathing and/or a mechinum like pain while the signal is not pain it couild be something simular as pain is likly to wake you

and just thinking about it i never have that dead body part fealing that you get from leaning on a body part like puting your elbow on your leg a cutting the curculation off i know i very little bit about my body as i get involentry movements when blood pressure is too high so i think its to do with the abc of the body airway breathing and cirulation (simular to the checks for cpr but your body prevents that by detecting blood build up to find a blockage hence the area you are laying on my cirulation is so sensitve when i am awake and sitting down that if i stay seated too long i have a realy small fit (my legs move out from under me with no warning i think the quick movement is to let the blood though as being seated is different to laying down but have you slept in a chair that will allow you to move? i bet you find your self on the floor where it make blood easer to flow (this is a guess based on what i learned at school and by observation)

while ever your body is in a position to do so it is continually moving your position if it did not do so the blood supply to the area in contact with another surface,be it a bed or a chair, would be greatly restricted. This then leads to oxygen starvation in the tissue which is often experienced as cramp and commonly referred to as pins and needles. this is the signal for the body to move its position.

If the worst was to happen and the body did not move its position the tissue would die.

i think that it's the pressure that your bed or the surface you sleep on puts on your body, if your body is uncomfortable where you are, you'll move right? mabey the same reaction happenes when you sleep? either that or it has something to do with the fluids in you're ear that help you balance and stuff...

Your body will naturally turn while your asleep, it the bodies way of keeping good circulation and air flow.

Yes i know the Answer.

You have been out on the beer and you have just seen who you brought home

Alien activity. We're all microchipped, you know.

It has something to do with my wife elbowing me in the ribs, that's all I know.

yes