5.4 - Sleep and Dreaming Flashcards
Define “Hypnagogic State”:
Just before sleep, getting drowsy. Known as pre-sleep consciousness
What’s a “Hypnic Jerk”?
A sudden quiver or sensation of dropping, as…..
Circadian Rhythm?
Naturally occuring 24 or 25hr cycle
What is REM Sleep?
A stage of sleep characterized by rapid eye movements and a high level of brain activity. Deepest level/stage
What’s an EOG, and what does it do?
Electrooculograph; used to measure eye movements
What stage of sleep are Beta Waves found in? What are their characterisitcs?
Beta Waves are emitted while we’re awake!!!
What type of waves occur in Stage 1 sleep?
Theta Waves
What are Sleep Spindles?
Irregular patterns in brain waves (add mroe)
What kind of waves are prevalent in Stages 3 and 4 sleep?
Delta Waves, very high amplitude
What is the last stage of sleep, and what kind of waves occur in this stage?
Sawtooth waves
What’s a K Complex?
Find definition….
How do our levels of sleep change throughout the night?
We spend less time in deep sleep throughout the night, and increasingly more time in REM sleep..
What is Insomnia?
Difficulty in falling asleep or staying asleep
What is Sleep Apnea?
When a person stops breathing for brief periods during sleep
Define “Somnambulism”
When a person arises and walks around during sleep; usually during slow-wave sleep
aka Sleepwalking!
Define “Narcolepsy”
Sudden attacks of sleep during waking activites
What is Sleep Paralysis?
Experience of waking up but being unable to move
What are Night Terrors?
Abrupt awakenings with panic and intense emotional arousal
aka Sleep Terrors
What are the five major characteristics that distinguish dreaming from waking consciousness?
Intense Emotion
Illogical Thought
Meaningful Sensation
Uncritical Acceptance
Difficulty remembering dream on waking
What is Freud’s view on dreams?
That they hold meaning.
Latent Content: The dream’s true underlying meaning
Manifest Content: Dream’s apparent topic or superficial meaning
What type of waves are emitted when we’re drowsy or relaxed??
Alpha Waves
What is emitted during Stage 2 of sleep cycles?
Sleep spindles and K Complexes
What kind of waves are produced during REM sleep?
Sawtooth Waves
What’s the Activation Synthesis Model?
The theory that dreams are produced when the brain attempts to make sense of random neural activity that occurs during sleep
What part of the brain is less aroused during REM sleep?
The Prefrontal Cortex
What parts of the brain are more highly aroused/activated during REM sleep?
Areas associated with fear or emotion; AMYGDALA
Also the Motor Cortex and Visual Association areas
