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Ncs Quiz 1 Questions And Answers

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NCS QUIZ 1 QUESTIONS AND ANSWERS

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NCS QUIZ 1 QUESTIONS AND
ANSWERS

What is NCS? (nerve conduction studies) - Correct Answers -A diagnostic test used to
assess the function of nerves

How do NCS work? - Correct Answers -Stimulate nerves and record responses

Why do we do NCS? - Correct Answers -To identify nerve and muscle disorders

What is CMAP? - Correct Answers -Compound muscle action potential

What is Latency? - Correct Answers -Time it takes for the signal to travel from the
stimulation site to the recording electrode (unit: ms)

What is Duration? - Correct Answers -Time from onset to return to baseline (unit: m/s)

What is Amplitude? - Correct Answers -Strength of the impulses from the nerve fibers
(units: motor - mV, sensory - uV)

What is SNAP? - Correct Answers -Sensory nerve action potential

What does Antidromic (Anti) mean? - Correct Answers -Sending impulse in the opposite
direction of its natural pathway

What does Orthodromic (Ortho) mean? - Correct Answers -Sending impulse in the
same direction of its natural pathway

What is MUP? - Correct Answers -Motor unit potential

What is Conduction Velocity (CV)? - Correct Answers -Speed at which a nerve
transmits and impulse (unit: m/s)

What is the CV equation? - Correct Answers -CV = distance / (stim 2 - stim 1)

ex: 200mm / (10m/s - 5m/s) = 40 mm/s

Where is G1 for motor median? - Correct Answers -APB (abductor pollicis brevis)

Where is G2 for motor median? - Correct Answers -3-4 distal of APB (on the thumb)

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