Question 1
What is the primary ion responsible for the depolarization phase of a peripheral nerve action potential?
Correct Answer:
Sodium (Na+) influx through voltage-gated channels
Question 2
Saltatory conduction in myelinated peripheral nerves refers to which phenomenon?
Correct Answer:
The jumping of action potentials from one node of Ranvier to the next
Question 3
Which peripheral nerve fibers have the fastest conduction velocity?
Correct Answer:
Large myelinated A-alpha fibers (12-20 micrometers diameter)
Question 4
The biceps brachii muscle is primarily innervated by which nerve and spinal root?
Correct Answer:
Musculocutaneous nerve, C5-C6
Question 5
A Martin-Gruber anastomosis refers to what anatomical variant?
Correct Answer:
A communicating branch from the median to the ulnar nerve in the forearm
Question 1
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About this Exam

Prepare with the ABEM (EDX) Practice Questions - American Board of Electrodiagnostic Medicine Certification Exam practice quiz. This question bank includes 100 questions covering nerve, needle, conduction, motor, and shows. Use it to review important concepts, identify knowledge gaps, and build confidence for the related exam, course, or assessment.

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ABEM (EDX) Practice Questions - American Board of Electrodiagnostic Medicine Certification Exam

This practice set contains 100 questions from the matching question bank and focuses on nerve, needle, conduction, motor, and shows. Work through each question carefully, review the provided solutions, and revisit topics that need more study before your next attempt.

This is an independent study resource intended for practice and review; it is not an official examination or an endorsement by any organization named in the title.

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