5- States of Consciousness Flashcards
sleep, wake, altered states
states of consciousness
our awareness of ourselves and our environment
consciousness
the biological clock; regular bodily rhythms that occur on a 24-hour cycle
Circadian rhythm
Awake, stage 1, stage 2, stage 3, stage 4, REM
Sleep stages
The relatively slow brain wave of a relaxed, awake state; occur in the awake stage and stage 1
Alpha waves
Periodic, natural loss of consciousness
Sleep
False sensory experiences; hypnagogic sensations
Hallucinations
Bursts of rapid, rhythmic brainwave activity; occurs in stage 2 sleep
Sleep spindles
The large, slow brain waves associated with deep sleep; occurs in stage 3 and stage 4 sleep
Delta waves
Rapid eye movement sleep; a recurring sleep stage during which vivid dreams commonly occur; muscles are relaxed but other body systems are active (paradoxical sleep)
REM sleep
Non-rapid eye movement sleep; encompasses all sleep stages except for REM
NREM sleep
- slowed breathing
- some irregular brain waves
- easily awakened
- no more than 5 mins in this stage
- dreamlike sensations
- alpha waves
Stage 1 sleep
- brain waves become slower
- lasts around 20 mins
- transition phase: half of overall sleep cycle in this stage
- sleep spindles
Stage 2 sleep
- occurs about 30 mins after falling asleep
- slow wave/delta sleep
Stage 3 sleep
- first sleep cycle, spend 30 mins in delta sleep
- deep sleep
- where we see sleep walking
- also night terrors occur in this sleep
- slow wave/delta sleep
Stage 4 sleep
- pulse quickens
- breathing becomes fast and irregular
- but our brainstem blocks messages from the motor cortex
- after, we go back to stage 1
- brain waves pick up speed and strengthens
- 8-9 hours asleep–> last 4 hours will be spent more in this stage then first half
- brain waves look more like someone awake based on brain activity
REM sleep
recurring problems in falling and staying asleep
Insomnia
A sleep disorder characterized by uncontrollable sleep attacks; the sufferer may lapse directly into REM sleep, often at inopportune times
Narcolepsy
A sleep disorder characterized by temporary cessations of breathing during sleep and repeated momentary awakening
Sleep apnea
A sleep disorder characterized by high arousal and an appearance of being terrified; unlike nightmares, these occur during stage 4 sleep and are seldom remembered
Night terrors
Occur in stage 4 sleep and run in families
Sleep walking and sleep talking
A sequence of images, emotions, and thoughts passing through a sleeping person’s mind
Dream
According to Freud, the remembered story line of a dream
Manifest content