Psy 240 Week 6

Week Six Sleeping and Dreaming

PSY/240

Sleeping and Dreaming

Sleep is considered a natural state in which there is reduced consciousness, reduced sensory activity, and inactivity of all muscles. Sleep is needed for the body to recharge, grow, and is essential for health and well-being. There are three standard psychophysiological measures of sleep and they define the stages of sleep. They are the electroencephalogram (EEG), the electrooculogram (EOG), and the neck electromyogram (EMG).

There are four different stages of EEG sleep. Stage 1 EEG is a low-voltage, high-frequency signal slower than being awake. When going from stage to stage the EEG voltage increases and the EEG frequency decreases. Once a person goes from stage 1 to stage 4, the cycles of sleep go back...