sleep

consciousness

someone’s varying level of awareness of thoughts, feelings, behaviors + events in someone’s internal and external world

sleep

naturally recurring state of reduced consciousness, cycle of brainwave patterns, body rests and restores

melatonin

sleep including hormone found in hypothalamus

biological rhythms

periodic physiological fluctuations in body

• recurring cycles of physiological/biological changes within an organism

circadian rhythms

daily behavioral/physiological cycles

• specific type of biological rhythm that lasts approximately 24hrs

sleep stages

identified by specific EEG pattern

stage 1

• sleep onset

• hypnagogic hallucinations

hypnagogic hallucinations

sensory phenomena, like visions and sounds, that a sleeper perceives in the transition between the wakefulness and sleep

stage 2

• muscle activity decreases, no longer aware of environment

• sleep spindles

• light stage

sleep spindles

short bursts of rapid brain waves, may be important for memory consolidation

stages 3-4

• delta waves/slow wave sleep

• deepest sleep and most difficult to awake

• confused and disoriented once woken up

• replenishes bodys chemical supplies, hormones, immune system

• bed wetting, sleep talking, sleep walking

stage 5

• REM sleep

• paradoxical sleep

rapid eye movement (REM)

• an active stage of sleep during with dreaming occurs

• muscles twitch

• eyes move up and down left and right

paradoxical sleep

our brain waves appear active and intense like when we’re awake

REM deprivation

interfered w memory

REM rebound

next time you sleep, longer and more REM sleep will occur

• more stress = longer REM sleep

sleep disorders

involved problems w quality, timing, amount of sleep, which result in daytime distress and impairment in function

insomnia

inability to sleep, problems with falling asleep, waking up at night, waking up too early

• 10% of population

• common w women

• stressed thin depressed people

somnambulism

occurs during deepest stages of sleep

• stage 3-4 within the first few hours of sleep

• usually children

REM sleep behavior disorder

someone physically acting out their dreams; due to lack in normal muscle paralysis during REM

• leads to kicking, punching, talking while asleep; usually in response to dream content

narcolepsy

intense sleepiness, uncontrollable

• unpredictable, sleeping anytime

sleep apnea

individuals stop breathing bc windpipe bails to open or brain processes involved in respiration fail to work properly

activation synthesis theory

looks at dreams like biological phenomena

consolidation THEORY

a THEORY of a process where the brain transforms short term memories into longer memori s

MEMORY consolidation

THE ACTUAL PROCESS of the brain stabilizing new, fragile memories into long durable ones

restoration sleep

theory that sleep serves as a vital function to repair body’s energy + resources that are depleted throughout the day