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Neruogenesis
production of new neurons, seldom happens in adults
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Stem cells
immature cells that renew and can develop into mature cells (early embryos)
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4 types of neurotransmitters
- Serotonin
- Dopamine
- Acetylcholine
- Norepinephrine
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Serotonin
sleep, appetite, learning, memory, emotion, mood, sensory perception, and pain suppression.
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Dopamine
- voluntary movement, learning, memory, emotion, and response to novelty and pleasure.
- Too much= schizophrenia
- Too little= parkinson's disease
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Acetylcholine
muscle action, cognitive function, memory, and emotion. Dream State - REM
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Norepinephrine
increased heart rate during stress, learning, memory, sleep and dreaming, awakening, emotion
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GABA
inhibition of the function of the brain.
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Endorphins
pain reduction, pleasure, and memory
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EEG
measures surface electricity of the brain
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CAT
sliced images of brain, good on hard tissue
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MRI
good for brain tissue and soft tissue structures
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PET
shows biochemical activity of brain
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Central Nervous system
- Brain
- Spinal cord: bridge between brain and peripheral nerves
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Peripheral Nervous system
- Somatic: controls skeletal muscles
- Autonomic: regulates internal body organs
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Sympathetic division
Parasympathetic division
- action and energy
- conserves energy
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Endocrine system
glands and hormones
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Melatonin
pineal gland, regulation of biological rhythm (initiates sleep)
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Adrenal hormones
emotion and stress
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Sex hormones
reproductive development, gender characteristics
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Brain statistics
- gray and white matter
- 2-3 pounds
- electrochemical mechanism
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Pons
sleeping and dreaming, communication
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Cerebellum
movement and balance
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Reticular Activating system
alert, sleep - awake cycle
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Primitive brain
- Thalamus: relay station
- Hypothalamus/Pituitary gland: regulator
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Limbic system
- 4 F's of psych: Food, Fight, Fear, Sex)
- memory and emotion
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Amygdala
Arousal, emotion, and memory; aggressive-defensive posture
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Hippocampus
memory and emotion, short-term to long term info
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Cerebrum
largest brain structure
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Cerebral cortex
layers of brain cells
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Right hemisphere
controls the left side balance, creative, musical, art, sapatial, and emotion
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Left hemisphere
controls the right side balance, logical, reasoning, math, and language
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Frontal lobes
mood, facial expressions, plan, anticipate, language, concepts, beliefs, memory and emotion, expressive
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Temporal lobes
Wernicke's area, receptive language
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Partial lobe
spacial, directions, face recognition, sensation (touch, pain)
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Occipital lobe
visual understanding
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James
stream of consciousness: always changing and flowing, of the moment
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Freud
- -conscious: completely aware
- -preconscious: in between conscious and unconscious (dreaming)
- -unconscious: suppressed things come out in dreams
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Psychological dream theory (Freud)
symbols of the unconscious, manifest content (what happens, storyline) and latent content (interpretation)
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Biological dream theory (McCarley and Hobson)
Activation theory: dreams are random burst of neural impulses
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Psyc/Bio dream theory
Lucid Dreaming: change dream in mid-stream
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Kleitman Studies
- REM sleep is related to dreams
- outside things affect dream
- people know how long they dream
- "morning wood" not related to dreams
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Insomnia
inability to maintain or stay asleep
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Narcolepsy
suddenly sleeping (like Mr. Bean)
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Sleep Stages
- REM- dream state
- 1) Alpha
- 2) K-complex (spikes in alpha waves
- 3) Theta (long waves)
- 4) Delta (night terrors, sleep walking/talking)
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Hypnosis
distraction, expectation, and thus, altering one's consciousness
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Stage Hypnosis
20% easy, 60% medium, 20% no
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Clinical use of hypnosis
- pain reduction
- anxiety reduction
- child birth
- conversion disorders (the mind makes it real)
- stress related problems
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Meditation
simple form of relaxation, focusing on focal point, progressive relaxation
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Biofeedback
using machines to monitor how well you relax (like a mood ring)
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Guided Imagry
image helps relaxation
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