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neuron
highly specialized cells that communicate info in electical and chemical forms
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cell body
contains nucleus and provides energy
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axon
carries signal away, to toher body areas
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myelin sheath
allows increase in neuron speed
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action potential
brief electrical impulse, info transmitted along axon
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synapse
point of communication(area for transfer of signals)
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neurotransmitters
enable neurons to excite or inhibit one another
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acetylcholine
muscle, cognitive function, memory (alzheimers)
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dopamine
- voluntary movement, thought process, rewarding sensations
- (parkinsons, schiz, drugs)
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serotonin
- mood, sleep, apetite
- (too little = depression)
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norepinephrine
- physical arounsal, learning memory, increased <3 rate
- (depression, stress)
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GABA
- inhibition of brain activity
- (anxiety/epilepsy)
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glutamate
major excitatory neuro transmitter
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endorphins
- pain perception,+ emotions
- (too much = opiate addiction)
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neurogenesis
birth of new neurons
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excitatory neurotransmitters
increase the possibility the next neuron will fire
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