Sleep does not mean physical immobility as stated above. Only in REM sleep does the inhibition of striated muscle occur, and even then there are frequent bodily movements in REM sleep. Bodily movements are common in all other sleep stages. As a technologist in a Sleep Disorders Center, I have watched thousands of sleep studies and have yet to see anyone sleep without moving. A common example of motor activity in sleep, accessable to those who are not sleep technologists - sleepwalking. --rpsgt244 |