Nerves Exam 1

Question 1

Suprascapular nerve

Answer 1

Innervates: Supraspinatus

                 Infraspinatus

Path: Descends from C5.

Passes through the scapular notch under the transverse scapular ligament into supraspinatus.

Passes around base of scapular spine and into infraspinatus

Question 2

Thoracodorsal Nerve

Answer 2

Innervates: Latissimus Dorsi

Path: Branches from posterior cord of brachial plexus

Question 3

Dorsal scapular nerve

Answer 3

Innervates: Rhomboids (minor and major) and Levator Scapulae

Path: Descends from C5 and passes deep to the muscles

Question 4

Axillary Nerve

Answer 4

Innervates: Deltoid and Teres Minor

Path: Passes through quadrangular space between:

Teres major and minor

Long head of the triceps and humerus

Question 5

Accessory Nerve

Answer 5

Innervates: Trapezius and Sternocleidomastoid

Path: Cranial nerve CN XI, descends from the base of skull, out of posterior triangle of neck, down the side of the neck and deep to trapezius

Question 6

Upper subscapular nerve

Answer 6

Innervates: Subscapularis

Path: Stem from posterior cord of brachial plexus

Question 7

Lower subscapular nerve

Answer 7

Innervates: Subscapularis and Teres major

Path: Stem from posterior cord of brachial plexus

Question 8

Long thoracic nerve

Answer 8

Innervates: Serratus anterior on superficial surface of the muscle

Path: Descends from C5, C6 and C7

Question 9

Musculocutaneous nerve

Answer 9

Innervates: Biceps, brachialis, and coracobrachialis

Path: Lateral cord of brachial plexus

Question 10

Median Nerve

Answer 10

Innervates: Pronator teres, flexor carpi radialis, palmaris longus, half of flexor digitorum profundus, flexor pollicis longus, pronator quadratus, flexor digitorum superficialis

Path: Deep to Bicipital aponeurosis, through pronator teres, runs down center of forearm deep to flexor digitorum superficialis

Question 11

Ulnar Nerve

Answer 11

Innervates: Flexor carpi ulnaris, half of flexor digitorum profundus

Path: Posterior to medial epicondyle, through flexor carpi ulnaris, down ulnar side of forearm deep to flexor carpi ulnaris

Question 12

Radial Nerve

Answer 12

Innervates: Triceps, supinator, bracioradialis, extensor carpi radialis longus, extensor carpi radialis brevis, extensor digitorum, extensor digit minimi, extensor carpi ulnaris, abductor pollicis longus, extensor pollicis longus, extensor pollicis brevis, extensor indicis.

Path: Branches from posterior cord, passes between lateral and medial heads of triceps along radial groove; anterior to lateral epicondyle of humerus, deep to brachioradialis, deep radial nerve to posterior compartment (mostly motor); superficial radial nerve to dorsal skin (mostly sensory), superficial to snuffbox tendons