Levels of awareness Flashcards
System in the brain which is activated leading to an alert state
Reticular activating system
The study of biological rhythms e.g. sleep wake cycles
Chronobiology
Category of biological processes that repeat every 24 hours e.g. a sleep wake cycle
Circadian
Category of biological processes that take less than 24 hours to complete a cycle e.g. phased brain activities during sleep
Ultradian
Category of biological processes that take longer than 24 hours to complete a cycle e.g. a menstrual cycle
Infradian
External time cues that impact biorhythms
Zeitgebers
Area in the brain that acts as an internal pacemaker and regulates biorhythms
Suprachiasmatic nucleus
State of consciousness with focused attention and reduced peripheral awareness
Hypnosis
Two theories about what occurs during hypnosis
Altered state - hypnosis is an altered state of awareness
Non-state - hypnosis is a form of imaginative role-enactment
A state of consciousness other than normal waking or sleeping consciousness, can be seen in hypnosis, meditation, prayer or after consuming recreational drugs
Trance
Percentage of sleep time spent in sleep stage 1
5%
Percentage of sleep time spent in sleep stage 2
45%
Percentage of sleep time spent in sleep stage 3
15%
Percentage of sleep time spent in REM sleep
25%
EEG findings in sleep stage 1
Theta waves (4-7 Hz)
EEG findings in sleep stage 2
Theta waves, K complexes and sleep spindles
EEG findings in sleep stage 3
Delta waves (0-4 Hz)
EEG findings in REM sleep
Mixed, predominantly beta
Characteristics of sleep stage 1
Dozing off
Hypnotic jerks
Myoclonic contractions associated with a feeling of falling
Characteristics of sleep stage 2
Drop in body temperature
Slowed heart and breathing rate
Eye movement stops
Characteristics of sleep stage 3
Deepest stage of sleep
Length of stage 3 sleep decreases over the course of the night
Characteristics of REM sleep
Dreaming Rapid eye movements Penile erection Deafness Loss of muscle tone Autonomic instability
