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qid 6729 · health
Question: Which of the following is true of the assessment of power in the arms?
- Extension at the elbow is produced by the biceps muscle
- Grade 3/5 (MRC scale) represents movement of the arm only when gravity is eliminated
- Grade 2/5 power represents movement of the arm only against gravity.
- The brachioradialis muscle is responsible for shoulder abduction
- Grade 0/5 power represents full range of motion with resistance
- The root value of shoulder abduction is C5
- Flexion at the elbow is produced by the triceps muscle
- Grade 5/5 (MRC scale) represents movement of the arm only when gravity is eliminated
- The root value of shoulder abduction is C7
- Grade 1/5 power represents no movement or muscle contraction
Our answer: F. The root value of shoulder abduction is C5 Source quote machine-checked (exact quote)
How it was answered
Stored method, replayed by code (kind: formula)
Current source
GetOnCourse.ai, "Motor testing of myotomes" (medical anatomy revision page)
“C5 (deltoid) is key for shoulder abduction; test by resisting downward arm pressure.”
Source quote machine-checked (exact quote)
Earlier version (superseded)
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