Brachial Plexus

Question 1

Suprascapular

Answer 1

Runs from: C6+C7, threads between supraspinatus and subscapularis near neck of scapula

Innervates: Suprapsinatus and infraspinatus

Question 2

Subscapular

Answer 2

Runs from: C6+C7, goes straight to subscapularis so very short

Innervates: Subscapularis

Question 3

Musculocutaneous

Answer 3

Runs from: C6+C7+C8, travels deep to biceps and ends on deep distal biceps

Innervates: Biceps brachii, brachialis, coracobrachialis

Question 4

Axillary

Answer 4

Runs from: C7+C8, enters between the subscapularis and teres major

Innervates: Teres major, teres minor, deltoideus, some subscapularis

Question 5

Radial

Answer 5

Runs from: C7+C8+T1+T2, enters triceps distal to teres major

Innervates: Triceps, tensor fasciae antebrachii, anconeus, extensor carpi radialis, supinator, common digital extensor, lateral digital extensor, ulnaris lateralis

Question 6

Median

Answer 6

Runs from: C8+T1+T2, runs beside ulnar nerve down medial head of triceps, then passes cranial to humeral epicondyle.

Innervates: Pronator teres, flexor carpi radialis, pronator quadratus, superficial digital flexor, deep digital flexor

Question 7

Ulnar

Answer 7

Runs from: C8+T1+T2, runs beside median nerve. Runs down medial head of triceps, then passes caudal to humeral epicondyle.

Innervates: Flexor carpi ulnaris, deep digital flexor, interossei, skin of caudal antebrachium, palmar paw