ap psychology sleep and conciousness

activation-synthesis theory

theory of why we dream that states that the pons send out random action potentials and the cortex then tries to make sense of the messages by creating odd story lines

biological rhthyms

bodily functions regulated by an internal clock

blood-brain barrier

a layer of tissues around the brain and spinal cord to keep harmful materials out

• psychoactive drugs can pass through

circadian rhthym

a sleep internal clock

delta waves

the deepest sleep brain wave, occurs in stage 3 sleep

insomnia

inability to fall or stay asleep

latent conent

freud- the underlying meaning of dreams

manifest content

freud- the remembered storyline of dreams

narcolepsy

uncontrollable lapses into sleep, treated by stimulants

pons

part of the brain responsible for sleep/dream cycle

reticular formation

part of the brain responsible for conciousness

rem rebound

when sleep deprived, the brain will go through other stages of sleep quicker than normal in order to get more rem sleep

rem sleep

last stage of sleep, dreaming, gets longer as night goes on

somnambulism

cessations in breathing while sleeping, increases chances of obesity

stage 1 of sleep

falling asleep, theta and alpha waves

stage 2 of sleep

theta waves

stage 3 of sleep

delta waves, deepest stage of sleep, gets shorter as night progresses

suprachiasmatic nucleus

part of the brain that releases melatonin

tolerance

condition in which the body gets used to a substance and needs more in order to get the same result

withdrawal

occurs when the use of a psychoactive substance is suddenly stopped