PSYCHOLOGY OF EMOTIONS

Detailed explanation-1: -Sleep:a periodic, natural loss of consciousness. Throughout the night, the body experiences many sleep cycles, each one lasting around 90 minutes. Each cycle has 5 stages (1, 2, 3, 4, REM) Page 2 Beta waves:waves of someone who is wide awake. Alpha waves:the relatively slow brain waves of a relaxed, awake state.

Detailed explanation-2: -Sleep is a state of reduced responsiveness to the environment, decreased voluntary muscle activation, and largely inhibited sensory modalities. Hence, it is a state of altered consciousness.

Detailed explanation-3: -periodic, natural loss of consciousness-as distinct from unconsciousness resulting from a coma, general anesthesia, or hibernation. (Adapted from Dement, 1999.) false sensory experiences, such as seeing something in the absence of an external visual stimulus. the large, slow brain waves associated with deep sleep.

Detailed explanation-4: -Also called rapid eye movement sleep.

Detailed explanation-5: -Deep sleep is a state of physiological reversible unconsciousness. The change from that state to wakefulness is mediated by the reticular activating mechanism.