Brachial Plexus

Identify a muscle that is NOT innervated by one of the branches from the inferior trunk of the brachial plexus.

• Triceps

• Brachialis

• Deltoid

• Anconeus

What are the nerve roots that supply the innervation of the starred muscle?

• C5, C6

• C5-C7

• C5-C8

• C5-C8, T1

What are the nerve roots that supply the innervation to the muscle that takes its proximal attachment at the starred and circled area?

• C5, C6

• C5-C7

• C5-C8

• C5-C8, T1

What provides cutaneous innervation to the medial forearm?

The anterior divisions of which trunk(s) of the brachial plexus form the lateral cord?

• Superior and inferior

• Superior and middle

• Middle and inferior

• Superior, middle, and inferior

What structure reinforces the elbow laterally?

What structure encircles the radial head and gives stability to the radius against the ulna?