Musculocutaneous nerve

Question 1

What muscles are innervated by the Musculocutaneous nerve?

Answer 1

Muscles of the anterior compartment of the arm (Coracobrachialis, Biceps brachii and Brachialis)

Question 2

What sensory innervation does the muculocutaneous nerve supply?

Answer 2

Lateral surface of the forearm (via a branch called the lateral cutaneous nerve of the forearm)

Question 3

How can a lesion to the Musculocutaneous nerve occur?

Answer 3

Stabbing

Question 4

What motor function is damaged by a lesion to the Musculocutaneous nerve?

Answer 4

Coracobrachialis, Brachialis and Biceps brachii are paralysed

Question 5

What movements are limited due to damage to the Musculocutaneous nerve?

Answer 5

Flexion at the shoulder is weakened
Flexion at the elbow is weakened
Supination is effected

Question 6

Which cord of the Brachial Plexus does the Musculocutaneous nerve arise from?

Answer 6

The lateral cord

Question 7

Where is the Musculocutaneous nerve as it passes down the arm?

Answer 7

Anterior to the Brachialis and posterior to the Biceps brachii