Chap 4--Sleep, Dreaming, Circadian Rhythm 4.1-2 Flashcards
Consciousness
Feelings, thoughts, and aroused states in which we are aware
Microsleep
A brief episode of sleep that occurs in the midst of a wakeful activity
Circadian Rhythm
Changes in bodily processes that occur repeatedly on approximately a 24-25 hour cycle
Suprachiasmatic Nucleus
A group of brain cells located in the hypothalamus that signal other brain areas when to be aroused and when to shut down
Meletonin
A hormone that facilitates sleep
Non-REM Sleep
The relaxing state of sleep in which the person’s eyes do not move
REM Sleep
The active state of sleep in which the person’s eyes move
REM Behavior Disorder
A condition in which normal muscle paralysis does not occur, leading to violent movements during REM sleep
REM Rebound
The loss of REM sleep is recouped by spending more time in REM sleep on subsequent nights
Manifest Content
According to Freud, what the dreamer recalls upon waking
Latent Content
According to Freud, the symbolic meaning of dreams
Threat Simulation Theory (TST)
Suggests that dreaming is an ancient biological defense mechanism that allows us to repeatedly simulate potentially threatening situations so that we can rehearse our responses to these events
Activation-Synthesis Theory
Suggests that dreams do not have symbolic meaning but are the by-products of the brain’s random firing of neural impulses during REM sleep
Sleep Disorder
A disturbance in the normal pattern of sleeping
Insomnia
A sleep disorder in which a person cannot get to sleep and/or stay asleep