continues to control all autonomic functions such as blood flow, heart pulsation, and lung inflation. During the sleep, homeostasis will fluctuate because sleep occurs on four stages (Davidmann, 1998). The individual goes from awake to stage 1, then to 2, 3, and finally 4, the deepest stage of sleep. After spending about twenty minutes in stage 4, they return to stage 1 and progress back to stage 4. The individual will continue to make these cycles throughout their sleep. Most individuals will experience about 4 to 5 cycles a night (Davidmann, 1998). This is why humans are more apt to wake up at specific times in the night and not sporadically (most people do not notice this however). During stage 1 the individual will experience what has been named REM (Rapid Eye Movement), I will make further elaboration on REM momentarily. For now I would like to point out that during REM the body will show more signs of consciousness by spontaneous muscle contractions, flagellate excretion, and oculomoter coordination (eye movement). The body will experience these tensions and reactions because this is the active time of sleep in the average human (Davidmann, 1998). I spoke earlier of REM (Rapid Eye Movement); it is the time in which the individual will have their dreams. Nathaniel Kleitman discovered it in 1953. It always occurs in the lightest stage of sleep, stage 1. It has been given its name because of the muscle contractions in the eye motor receptors. These electrical impulses originate from the brain stem and then travel to the ...
