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Questions and Answers
In the arm, how does the median nerve relate to the brachial artery?
In the arm, how does the median nerve relate to the brachial artery?
- It runs posterior to the brachial artery.
- It crosses the brachial artery from lateral to medial. (correct)
- It runs anterior to the brachial artery, without crossing it.
- It crosses the brachial artery from medial to lateral.
As the median nerve enters the forearm, which muscle does it lie superficial to?
As the median nerve enters the forearm, which muscle does it lie superficial to?
- Brachialis (correct)
- Brachioradialis
- Biceps brachii
- Pronator teres
In the cubital fossa, where is the median nerve located relative to the brachial artery?
In the cubital fossa, where is the median nerve located relative to the brachial artery?
- Anterior
- Medial (correct)
- Posterior
- Lateral
The anterior interosseous nerve, a branch of the median nerve, arises approximately how far distal to the lateral epicondyle of the humerus?
The anterior interosseous nerve, a branch of the median nerve, arises approximately how far distal to the lateral epicondyle of the humerus?
In the forearm, the median nerve passes deep to which muscle?
In the forearm, the median nerve passes deep to which muscle?
Flashcards
Median Nerve
Median Nerve
A major peripheral nerve of the upper limb, innervating the front of the arm and hand.
Brachial Artery Relationship
Brachial Artery Relationship
The median nerve crosses the brachial artery from lateral to medial at the midpoint of the arm.
Cubital Fossa Passage
Cubital Fossa Passage
At the elbow, the median nerve passes medial to the brachial artery and under the bicipital aponeurosis.
Anterior Interosseous Nerve
Anterior Interosseous Nerve
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Carpal Tunnel Entry
Carpal Tunnel Entry
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Study Notes
Median Nerve Relationships
- At the midpoint of the arm, it crosses the brachial artery, moving from the lateral to the medial side.
- It enters the forearm superficially to the brachialis muscle.
- At the elbow, it passes through the cubital fossa, medial to the brachial artery and beneath the bicipital aponeurosis.
- It passes between the humeral and ulnar heads of the pronator teres muscle, presenting a potential compression point.
- 5-8 cm distal to the humerus' lateral epicondyle, it branches into the anterior interosseous nerve. This nerve supplies deep muscles of the forearm's anterior compartment.
- It travels through the forearm, deep to the flexor digitorum superficialis muscle.
- Near the wrist, it becomes superficial, situated just under the palmaris longus tendon.
- Finally, it enters the hand by passing through the carpal tunnel.
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