NGUYEN: Axilla and Brachial Plexus

The brachial plexus arises from the spinal nerve roots of:

• C1 to C4

• C5 to C7

• C5 to C8

• C5 to T1

Which of the following is NOT a rotator cuff muscle?

• Infraspinatus m.

• Teres major m.

• Subscapularis m.

• Teres minor m.

Which of the following forms the inferior trunk of the brachial plexus?

• C5 to C6

• C6 to C7

• C7 to C8

• C8 to T1

The radial nerve directly branches from the ________.

• Posterior cord

• Medial cord

• Posterior division

• Median cord

Flexion of the thumb is by which of the following nerves?

• Musculocutaneous n.

• Median n.

• Ulnar n.

• Axillary n.