Brachial Plexus Course

Question 1

Pierces scalenus medius, descends deep to levator scapulae, and enters the deep surface of the rhomboids

Answer 1

dorsal scapular n.

Question 2

Descends posterior to C8 and T1 rami and passes distally on external surface of serratus anterior

Answer 2

long thoracic n.

Question 3

Descends posterior to the clavicle and anterior to the branchial plexus and subclavian artery

Answer 3

nerve to subclavius

Question 4

Passes laterally across posterior triangle of the neck, through scapular notch under superior transverse scapular ligament

Answer 4

suprascapular n.

Question 5

Pierces clavipectoral fascia to reach the deep surface of pectoral muscles

Answer 5

lateral pectoral n.

Question 6

Enters deep surface of coracobrachialis and descends between biceps brachii and brachialis

Answer 6

musculocutaneous n.

Question 7

Lateral root joins medial root to form median nerve lateral to the axillary artery

Answer 7

median n.

Question 8

Passes between the axillary artery and vein and enters deep surface of pectoralis minor

Answer 8

medial pectoral n.

Question 9

Runs along the medial side of axiallary vein and communicates with intercostobrachial nerve

Answer 9

medial cutaneous n. of arm

medial brachial cutaneous

Question 10

Runs between axillary artery and vein

Answer 10

medial cutaneous n. of forearm

medial antebrachial cutaneous

Question 11

Passes down medial aspect of arm and runs posterior to medial epicondyle to enter forearm

Answer 11

ulnar n.

Question 12

Passes posteriorly and enters subscapularis

Answer 12

upper subscapular n.

Question 13

Arises between upper and lower subscapular nerves and runs inferolaterally along posterior axillary wall to latissimus dorsi

Answer 13

thoracodorsal n.

Question 14

Passes inferolaterally, deep to subscapular artery and vein, to subscapularis and teres major

Answer 14

lower subscapular n.

Question 15

Passes to posterior aspect of arm through quadrangular space (which is bounded superiorly by the subscapularis and teres minor) in company with posterior circumflex humeral artery and then winds around surgical neck of humerus; gives rise to lateral brachial cutaneous nerve

Answer 15

axillary n.

Question 16

Descends posterior to axillary artery; enters radial groove with deep brachial artery to pass between long and medial heads of triceps

Answer 16

radial n.