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Questions and Answers
What is the primary root value of the musculocutaneous nerve?
What is the primary root value of the musculocutaneous nerve?
- C1, C2, and C3
- C5, C6, and C7 (correct)
- C7, C8, and T1
- C4, C5, and C6
From which part of the brachial plexus does the musculocutaneous nerve originate?
From which part of the brachial plexus does the musculocutaneous nerve originate?
- Posterior cord
- Central cord
- Medial cord
- Lateral cord (correct)
Which muscle does the musculocutaneous nerve pierce in its course?
Which muscle does the musculocutaneous nerve pierce in its course?
- Deltoid
- Coracobrachialis (correct)
- Triceps brachii
- Brachioradialis
Which area is primarily supplied by the musculocutaneous nerve?
Which area is primarily supplied by the musculocutaneous nerve?
Which muscles are supplied by the musculocutaneous nerve?
Which muscles are supplied by the musculocutaneous nerve?
Flashcards
Musculocutaneous Nerve
Musculocutaneous Nerve
A nerve that is a branch of the lateral cord of the brachial plexus, responsible for motor and sensory innervation of the arm.
Root Value of Musculocutaneous Nerve
Root Value of Musculocutaneous Nerve
C5, C6, and C7; these are the spinal roots contributing to this nerve.
Supplies of Musculocutaneous Nerve
Supplies of Musculocutaneous Nerve
Primarily supplies flexors of the arm, including biceps, brachialis, and coracobrachialis.
Relationship with Coracobrachialis
Relationship with Coracobrachialis
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Function of Musculocutaneous Nerve
Function of Musculocutaneous Nerve
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Study Notes
Musculocutaneous Nerve
- Root value: C5, C6, and C7
- Origin: branch of the lateral cord of the brachial plexus
- Supplies: primary nerve of the anterior arm; supplies flexors of the arm, biceps, brachialis, and coracobrachialis
- Relationships: pierces coracobrachialis muscle and emerges lateral to the biceps
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