Brachial Plexus Nerves

Question 0

Long Thoracic

Answer 0

Posterior aspect of ant. rami C5-C7

Serratus Anterior

Question 1

Dorsal Scapular

Answer 1

C5, frequent contribution from C4

Rhomboids, occasionally levator scapulae

Question 2

Suprascapular

Answer 2

Superior trunk, fibers from C5, C6

Supraspinatus and infraspinatus;

Question 3

Subclavian

Answer 3

Superior trunk; fibers from C5, C6 often C4

Subclavius and SC joint

Question 4

Lateral Pectoral

Answer 4

Side branch of lateral cord, fibers from C5, C6, C7

Pec. Major, some to pec. minor

Question 5

Musculotaneous

Answer 5

Terminal branch of lateral cord, C5-C7

Coracobrachialis, biceps brachii, and brachialis

Question 6

Median

Answer 6

Lateral-C6, C7
Medial-C8, T1
Muscles of ant. compartment, 5 intrinsic muscles in thenar half of palm and palmar skin

Question 7

Medial Pectoral

Answer 7

Side branches of medial cord C8, T1

Pec. minor and sternocostal part of pec. major

Question 8

Medial Cutaneous Nerve of Forearm

Answer 8

C8, T1

Skin of medial side of arm, distal as medial epicondyle of humerus and olecranon of ulna

Question 9

Median Cutaneous Nerve of Forearm

Answer 9

C8, T1

Skin of medial side of forearm, as far distal as wrist

Question 10

Ulnar

Answer 10

Larger terminal brach of medial corder from C8, T1, often C7
Flexor carpi ulnaris, ulnar half of flexor digitorum profundus, most intrinsic muscles of hand, skin of hand medial to axial line of digit 4

Question 11

Upper Subscapular

Answer 11

Side branch of post. cord from C5

Superior portion of subscapularis

Question 12

Lower Subscapular

Answer 12

Side branch of post cord from C6

Inf. portion of subscapularis and teres major

Question 13

Thoracodorsal

Answer 13

Side branch of post. cord, C6, C7, C8

Latissimus Dorsi

Question 14

Axillary

Answer 14

Terminal branches of post. cord from C5, C6

Glenohumeral joint, teres minor and deltoid, skin of superolateral arm

Question 15

Radial

Answer 15

Larger terminal branch of post. cord from C5-T1
All muscles of post. compartments of arm and forearm; skin of post. and inferolateral arm, post. forearm, and dorsum of hand lateral to axial line of digit 4