Chapter 3 Flashcards
What is consciousness?
The awareness of yourself and your surroundings
Consciousness works with our behavior to do what with our attention?
Direct it and focus it on other stimuli.
What is selective attention?
Allows us to focus our awareness on certain things, while ignoring others.
What was frued levels of consciousness?
Conscious- Awake and aware
preconscious -not actively aware of (stored knowledge)
Unconscious- repressed thoughts and traumas/desires that we are unaware of
(Ice berg diagram)
What was william janes theory of consciousness?
- two levels to consciousness
1.) area of focus: directing your attention to.
2.) peripheral consciousness: the unfocused surrounds in your awareness (i.e. other stimuli and surrounds)
(stream of consciousness)
Why do we sleep?
protection from danger
energy conservation
Body and mind RESTORATION
memory consolidation
What is circadian rhythms?
biological/physiological cycle.
i.e the sleep wakefulness patterns or light and darkness patterns
Which brain structure regulates circadian rhythms?
Hypothalamus
what is a collection of neurons referred to as?
what is the nuclues of the hypothalamus referred to as?
nucleus
suprachiamastic nucleus: specialized group of neurons promoting proper sleep cycle.
What are the stages of sleep?
REM- active sleep ( physiological arousal, rapid eye movements)
NREM- (stages 1-3) less mentally and physiologically involved form of sleep.
When do people get the most deep sleep?
the beginning of their sleep
NRem 1?
relatively slow, irregular brain waves (easy to wake)
hypnagogic experiences
NRem 2?
- easily wake able
- breathing and heart rate and brain waves slows.
- Sleep spindles: periodic spikes of high brain activity
- K-complexes: single high-amplitude brain waves
NRem 3?
slow wave of “deep sleep”
brain activity is very slowed
tougher to wake
- can experience parasomnias ( night terror, move, walk, talk) when transitioning to Rem sleep
What stages of sleep can sleep talking occur in?
any stages of sleep via random action potentials firing
What stages can sleep walking occur in?
deep sleep (NRem 3)
Who founded REM sleep?
Eugene Aserinsky
What do Rem sleep brain waves look like?
sawtooth waves
What goes on during paralysis?
You motor cortex is producing action potentials that are blocked by your brain stem and prevent you from moving.
Why do we dream?
Sigmond Frued: unconscious fulfillment
memory consolidation
developing/maintain neural pathways
no purpose at all
Manifest content?
the story and imagery of the dream, which is largely symbolic
Latent content?
the underlying unconscious meaning of the dream
What is the activation synthesis theory?
Minds effort to try to make sense of random action potential’s firing in the brain
What is the physiological maintenance theory?
Dreams are exercise for developing and preserving neural pathways.
What is the memory consolidation theory?
Dreams reflect the process of sorting and organizing the recent events unto the long-tern memory.
What is day-dreaming?
Day dreaming is when you’re sitting and doing nothing, but your mind is doing all sorts of random things.
Your frontal and temporal lob are highly active in this time.
What is a coma?
An unconscious state that lacks the normal sleep/wake cycles.
Do patients in coma’s dream?
Nope.
Is a coma a stable condition?
Nope.
What is a minimally conscious state?
Limited conscious awareness can respond to simple commands can answer simple questions demonstrating purposive behavior full awake and Rem cycle's
What is a persistent vegetative state?
Primarily reflexive behaviors
Largely non-responsive and lacking visible signs of conscious awareness
Reduced REM (but otherwise normal sleep-wakefulness cycles)
Recovery is rare, but depends on the causes.
