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37 Cards in this Set
- Front
- Back
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depolarization of electrical impulses in the brain occurs with?
-K+ efflux -Na influx |
Na influx
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Repolarization in the brain occurs with ?
-K+ efflux -Na influx |
K+ efflux
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Delta waves are found at what Hz and in what level of consciousness?
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<4 Hz and during sleep
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What waves are between 4-8 Hz and are found with drowsiness?
-alpha -beta -delta -theta |
theta waves, 4-8 Hz
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what brain waves are seen when awake but relaxed with Hz between 8-13
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alpha waves
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what eeg waves are seen during active concentration with Hz >13?
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beta
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smallest to largest name the waves of an eeg.
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delta
theta alpha beta |
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eeg waves with Hz of 8-13 are which ones?
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alpha
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brain waves change in the presence of what extraneous materials/conditions?
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drugs, trauma, uremia
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brain waves change in the absencs of necessary substances such as?
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O2, glucose, brain death,
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brain death + non convulsant seizures are an indirect indicator of ???
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cerebral perfusion
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narcolepsy will cause what type of brain waves?
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sleeping-delta
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if a pt has a brain tumor what will an eeg show?
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localized, decreased activity
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if a pt has encephalopathy, what will their eeg show?
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generalized, decreased activity
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a brain dead pt's eeg will show what?
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silence
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a synchronous spike and wave pattern is associated with what type of seizure?
-grand mal -petite mal |
petite mal
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synchronus high amplitude spikes means what type of seizure?
-grand mal -petite mal |
grand mal
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what are indications for an LP?
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meningitis, encephalitis, MS
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what are contraindications to doing an LP?
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Increased ICP
infection over site bleeding disorder (active) |
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what are complications of an LP?
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nerve root trauma
meningitis spinal h/a |
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what is the normal level of lymphocytes seen in the csf is?
-0 <3 <5 <10 |
<5
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what is the acceptable level of neutrophils seen in the csf?
0 <3 <5 <10 |
0
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the normal glucose level seen in the csf is what?
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45-80
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positive microsomal and thyroglubulin antibodies indicates what thyroid problem?
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hashimoto's thyroiditis
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which of the following have long dendrites and generate detectable action potential?
-axons -dendrites -pyramidal neurons |
pyramidal neurons
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a temporal lobe seizure may cause?
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bizarre behavior
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what is normal csf pressure?
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7-20 cm H20
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what is xanthochromia?
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yellow to orange tinting of the csf
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what is the fix for a leaking csf tap if bedrest hasn't worked?
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blood patch by anesthesia
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if the glucose of the csf is <45 what is this indicative of?
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bacterial infection
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what will you find in the csf of an MS pt?
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oligoclonal bands in the csf
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NCV measures what?
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action potential of muscles
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what are indications for a NCV?
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ulnar nerve compression
CTS DM neuropathy nerve root compression |
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a normal motor unit wave form has how many turns about baseline?
1 2 3 4 |
3
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a low amplitude waveform on the EMG is indicative of ?
-neurogenic problem -myopathic problem |
myopathic problem
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t/f
high frequency hearing loss is more common than low frequency hearing loss |
true
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why is high frequency loss more common than low?
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high frequency hairs are closer to the round window than low frequency
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