Never conduction studies
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| The cathode is negative or positive? | negative
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| Where is the cathode placed? | over the nerve
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| The anode is negative or positive? | positive
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| What does the cathode do to the nerve?(depolarize or hyperpolarize) | depolarize
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| What does the anode do to the nerve?(depolarize or hyperpolarize) | hyperpolarize
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| The sum total of all fibers recorded is known as the _____? | amplitude
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| The amplitude is measured in ______ for sensory and _____ for motor. | microvolts/milivolts
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| This measurement is taken from the baseline to the peak. | amplitude
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| The initial deflection of the negative phase to the return of the positive phase is called? | duration
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| Duration is measured in _______. | milliseconds
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| The time laps from the stimulation to the response is called the ______. | latency
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| Latency is measured in ______. | milliseconds
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| What is the normal shape of an evoked potential? | biphasic
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| Nerve conduction velocity(NCV)= ? | distance/(proximal latency-distal latency)
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| When conducting a NCS, the room temp should be above __ degrees C. | 25
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| How does cold effect NCV? | it slows it down
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| How does heat effect NCV? | it speeds it up
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| By what age do most nerves mature? | age 5
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| Below 5 years of age NCV is (slower/faster)? | slower
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| Where is NCV faster?(UE or LE) Why? | UE/nerves are shorter, diameters larger in UEs, temperature is higher in UEs
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| In motor nerve studies, prolonged latency = what? | slowed conduction
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| Prolonged palmar distal sensory latency is the 1st sign for what? | carpal tunnel
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| In motor nerve studies, prolonged latency of AP maybe the result of? | demyelination and/or axonal involvement
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| In motor nerve studies, decreased amplitude of AP maybe a result of? | axonal involvement
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| Slowed motor nerve conduction velocity maybe a result of? | demyelenation
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| What are the two main differences between orthodromic and antidromic? | ortho latency is shorter, ortho amplitude is smaller....(orthodromic is faster)
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| In sensory nerve studies, prolonged DSL(distal sensory latency) maybe a result of? | demyelination, and/or axonal involvement
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| In sensory nerve studies, decreased amplitude of SNAP(sensory nerve action potential) is a result of? | axonal involvement
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| Slowed SNCV(sensory nerve conduction velocity) is a result of? | demyelination
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| The H-reflex is the electrophysiological counterpart of the _____ reflex. | ankle MSR
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| The H-reflex is only good for what level of radiculopathy? | S1
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| Repetitive stimulation is done to test for disease of what? | the NMJ(neuromuscular junction)
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Created by:
txst spr 2009
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