Chapter 4: Neuroscience Flashcards
electroencephalogram
provide summary of brain activity over long period
Dopamine
affects reward system, cocaine blocks reuptake of dopamine, Parkinson’s have low dopamine (use Ldopa)
split-brain
cut corpus callous, Roger sperry did for to relieve severe epilepsy for his patients
parasympathetic nervous system
regular function
corpus callosum
bundle of axons connecting 2 hemispheres
Reticular formation
deals w/ sleep, major source of serotonin
serotonin
positive mood/sleep/appetite, prozac blocks reuptake = affect mood
relative refractory period
axon can fire but threshold higher
prefrontal lobe
short-term memory, moral reasoning, mood regulation
nucleus accumbens
reward learning
parietal lobe
somatosensory strip, where pathway
ALS (Amyotrophic Lateral Sclerosis)
death of motor neurons in spinal cord
endorphins
lessons perceptions of pain/heroin accepted by endorphin recpetors
action potential
sudden positive change in axon used to move excitatory charge, threshold
frontal lobe
planning/movement, Broca’s area for speaking, pre-frontal lobe
γ-Aminobutyric acid (GABA)
primary inhibitor neurotransmitter, reduces anxiety, valium/xanax increase flow
glia
600 billion, membrane covering/supporting
autonomic nervous system
sympathetic and parasympathetic nervous system
functional magnetic resonance imaging (fMRI)
detects changes of blood that show change in activity due to need of blood
striatum
anterior to thalamus, fluid motion with substantia nigra
resting potential
negative, when at rest
pons
anterior to medulla, arousal attention
occipital lobe
visual stimuli= colour, complex motion, patterns
synaptogenesis
production of new synpases
acetylcholine
muscle action/learning/memory, Alzheimer’s results in ACH producing neurons depleting
parkinson’s disease
death of dopaminergic neurons in substantia nigra
somatosensory strip
processes tactile info from all parts of body
medulla oblongata
basic functioning
somatic nervous system
sensory info + reflexes
positron emission tomography (PET) scan
detects uptake of certain dye molecules indicating areas of increased activity
pituitary gland
control endocrine system
thalamus
anterior to hypothalamus, relay station for sensory info, lateral geniculate nucleus (visual stimuli, medial geniculate nucleus (auditory stimuli)
cerebellum
motor coordination, learning involving movement, enables balance, motor performance/ memory
sympathetic nervous system
flight or fight response
neurogenesis
production of new neurons
peripheral nervous system
somatic/autonomic nervous system
hypothalamus
anterior to midbrain, endocrine hormonal system
neurons
100 billion, several dendrites, one axon
hippocampus
memory/learning, balance, damage causes inability to form episodic memory, spatial memory
midbrain
anterior to pons, substantia nigra (dopamine production)
Broca’s area for speaking
aphasia: inability to speak
multiple sclerosis
demyelination of axons in neurone = vision loss, pain, muscle weakness
Broca’s aphasia
ability to speak damaged but other language abilities stay
temporal lobe
amygdala, hippocampus, wernicke’s area for language comprehension, what pathway
absolute refractory period
axon unable to fire no matter stimulus strength
amydala
involved in fear/emotions
huntington’s disease
death of neurons in striatum
wernicke’s area for language comprehension
left side, fluent aphasia: inability to process speech, reply in gibberish