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Questions and Answers
Which terminal branch of the radial nerve is primarily responsible for innervating the muscles in the posterior compartment of the forearm?
Which terminal branch of the radial nerve is primarily responsible for innervating the muscles in the posterior compartment of the forearm?
- Anterior branch
- Posterior branch
- Superficial branch
- Deep branch (correct)
Where does the deep branch of the radial nerve enter the forearm in relation to the lateral epicondyle of the humerus?
Where does the deep branch of the radial nerve enter the forearm in relation to the lateral epicondyle of the humerus?
- Lateral
- Anterior (correct)
- Medial
- Posterior
Which anatomical structure does the superficial branch of the radial nerve cross?
Which anatomical structure does the superficial branch of the radial nerve cross?
- Anatomical snuffbox (correct)
- Cubital tunnel
- Guyon's canal
- Carpal tunnel
The radial nerve divides into its two terminal branches at which joint?
The radial nerve divides into its two terminal branches at which joint?
Which muscle does the superficial branch of the radial nerve course deep to in the forearm?
Which muscle does the superficial branch of the radial nerve course deep to in the forearm?
Flashcards
Radial Nerve
Radial Nerve
A major nerve that supplies the arm, dividing at the elbow into two branches.
Deep Branch of Radial Nerve
Deep Branch of Radial Nerve
The larger branch that innervates muscles in the posterior forearm; it enters the forearm near the lateral epicondyle.
Superficial Branch of Radial Nerve
Superficial Branch of Radial Nerve
The smaller branch that provides sensory innervation to the dorsal side of the hand and fingers.
Supinator Muscle
Supinator Muscle
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Anatomical Snuffbox
Anatomical Snuffbox
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Study Notes
Radial Nerve
- Divides into two terminal branches at the elbow
- Deep Branch of Radial Nerve
- Motor - innervates the muscles in the posterior compartment of the forearm
- Larger of the two terminal branches of the radial nerve
- Enters forearm anterior to lateral epicondyle of humerus
- Pierces supinator muscle
- Superficial Branch of Radial Nerve
- Sensory - contributes to the cutaneous innervation of the dorsal hand and fingers
- Smaller of the two terminal branches of the radial nerve
- Passes through forearm deep to brachioradialis muscle
- Crosses roof of anatomical snuffbox
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