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26 Cards in this Set
- Front
- Back
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What are the 4 major parts of the brain?
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-cerebrum
-cerebellum -diencephalon -brain stem |
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What are the 2 things that make up the diencephalon?
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-thalamus
-hypothalamus |
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What makes up the brain stem?
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-midbrain
-pons -medulla |
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Glial cells are what type of cells?
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supporting cells
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Multipolar cells do what?
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Many porcesses
-Perkinje cells -Pyramidal |
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Bipolar cells are found where?
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retina and olfactory
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Unipolar cells are found where?
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dorsal root ganglia
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WHen voltage gated Na and K channels are closed it is aka what?
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Resting stage
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WHen voltage dependent Na channels open and sodium rushes out it is called what?
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Depolarization
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What is repolarization?
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When voltage regulaed K channels open and K rushes out
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Delta waves
-size -shows what? |
-<4 hz
-slow wave sleep in adults and babies |
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Theta waves
-size -shows what? |
-4-8hz
-drowsiness in adults and young children |
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Alpha waves
-size -shows what? |
-8-13 hz
-awake and eyes closed relaxed adults |
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Beta waves
-size -shows what? |
->13 hz
-active, busy, anxious, thinking, concentration |
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Pyramidal neurons are uniformly oriented to what?
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cortical surface
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Pyramidal neurons have long dendrites and generate what?
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detectable action potentials
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The Thalamic nuclei is the probable what?
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pacemaker
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EEG potentials result from flow of current in what?
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extracellular fuld surrounding these neurons
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What are some things that can interfer with an EEG?
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-hypoglycemia
-caffeine -excessive movement -eye movement -bright/flashing lights -medications -tongue movements -poor grounding -IV drip |
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The patterns of associations between leads are called what?
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montages
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WHat are some activating things done when doing an EEG to see if there is any abnormal waveforms?
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-hyperventilation
-photo stimulation -Sleep |
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What is seen on EEG when there is a tumor?
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-slowing of electrical activity in localized tumor region
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What is seen on EEG in narcolepsy?
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-waves typically associated with sleep
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What is seen on EEG in brain death?
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-electro-cerebral silence
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What is seen on EEG in a grand mal seizure?
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-rhythmic, syncronous, high amplitude spikes
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What is seen on EEG in a petite mal seizure?
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-synchronous spikes and waves
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