Anatomy

Question 1

Innervated by the Lateral pectoral nerve (C5,6,7) & medial pectoral nerve (C8,T1) (ventral ramus)

Answer 1

Pectoralis Major

Question 2

Pectoralis Minor (innervation and arterial supply)

Answer 2

Innervated by the medial pectoral nerve (C8,T1)

????? artery

Question 3

Serratus Anterior (nerve and artery)

Answer 3

external surfaces of lateral parts of 1st through 8th ribs

Long thoracic nerve

Long thoracic artery

Question 4

Trapezius (innervation and arterial supply)

Answer 4

**spinal accessory nerve (CN XI) **

transverse cervical artery/posteriro intercostal arteries

elevates, retracts and rotates scapula, lower firbers depress scapula

Question 5

Deltoid Muscle

Answer 5

anterior and posterior branches of axillary nerve

Posterior circumflex humoral artery, deltoid branch of thoracoacromial artery

Question 6

Rhomboid major muscle

Answer 6

retracts and rotates scapula to depress the glenoid cavity

blood supply: dorsal scapular artery

Dorsal scapular nerve

Question 7

Supraspinatus muscle

Answer 7

initiates arm abduction, acts with rotator cuff muscles

suprascapular artery

suprascapular nerve (C5,C6)

Question 8

Latissimus dorsi muscle

Answer 8

Extends, adducts, and medially rotates humerus.

Thoracodorsal nerve (C6-C8)

Thoracodorsal artery

Question 9

Teres minor muscle

Answer 9

Lateral rotation of arm, adduction

Posterior branch of axillary nerve (C5, C6)

Circumflex scapular artery

Question 10

Teres major muscle

Answer 10

Adducts and medically rotates arm

Inferior subscapular nerve (C5, C6)

Circumflex scapular artery

Question 11

Infraspinatus Muscle

Answer 11

Lateral rotation of arm (with teres minor)

Suprascapular nerve (C5, C6)

**Suprascapular artery **

Question 12

Subscapularis muscle

Answer 12

Medially roatates arm and adducts it, helps hold humeral head in glenoid cavity

Superior and inferior subscapular nerves (C5, C6)

Subscapular artery

Question 13

Coracobrachialis muscle

Answer 13

flexes and adducts arm,

musculocutaneous nerve (C5, C6, C7),

muscular branches of brachial artery

Question 14

Biceps brachii muscle

Answer 14

Supinates forearm, Flexes forearm when supinated,

musculocutaneous nerve (C5, C6),

muscular braches of brachial artery

Question 15

Space that transmits axillary nerve and posterior circumflex humeral artery

Answer 15

Quadrangular space. (formed by teres minor, teres major, long head of the tricepts, and the humerus)

Question 16

Brachialis muscle

Answer 16

flexes forearm,

musculocutaneous nerve (C5, C6),

radial recurrent and muscular branches of brachial artery

Question 17

Brachioradialis muscle

Answer 17

flexes forearm,

radial nerve (C5, C6),

radial recurrent artery,

Question 18

Pronator teres muscle

Answer 18

pronates forearm,

median nerve (C6, C7),

anterior ulnar recurrent artery.

Question 19

Flexor carpi radialis muscle

Answer 19

flexes and abducts hand at wrist, median nerve, radial artery

Question 20

Tricepts brachii muscle

Answer 20

Extends forearm, long head stabilizes head of abducted humerus,

radial nerve (C6, C7, C8),

Profunda brachii (deep brachial) artery

Question 21

flexor carpi radialis muscle

Answer 21

fleses and abducts hand at wrist

median nerve

radial artery

Question 22

Palmeris longus muscle

Answer 22

Flexes hand and tenses palmar aponeurosis

median nerve

posterior ulnar recurrent artery

Question 23

Flexor carpi ulnaris muscle

Answer 23

flex and adducts hand at wrist

ulnar nerve

posterior ulnar recurrent artery

Question 24

Flexor digitorum superficialis muscle

Answer 24

Flexes middle and proximal phalanges of medial four digits; also flexes hand at wrist

median nerve

ulnar and radial arteries

Question 25

Flexor pollicus longus muscle

Answer 25

Flexes phalanges of thumb anterior interosseous branch of median nerve anterior interosseous artery

Question 26

Supinator muscle

Answer 26

supinates forearm Deep branch of radial nerve radial recurrent and posterior interosseous arteries

Question 27

Flexor digitorum profundus muscle

Answer 27

Flexes distal phalanges of medial four digits, assts in flexion of hand at wrist. Medial innervation: ulnar nerve, lateral part: medial nerve anterior interosseous artery and muscular branches of ulnar artery

Question 28

Pronator quadratus muscle

Answer 28

pronates forearm anterior interosseous branch of median nerve anterior interosseous artery

Question 29

Adductor pollicis muscle

Answer 29

Adducts thumb Deep branch of ulnar nerve Deep palmar arch artery

Question 30

1st and 2nd lumbrical muscles

Answer 30

Extends digits at IP joints and flexes MCP joints Median nerve Superficial and deep palmar arches

Question 31

3rd and 4th lumbrical muscles

Answer 31

Extends digits at IP joints and felxes MCP joints Deep branch of ulnar nerve Superficial and deep palmar arches

Question 32

extensor carpi radialis longus muscle

Answer 32

extends and abducts hand at wrist Radial nerve Radial artery and radial recurrent artery

Question 33

Supinator muscle

Answer 33

supinates forearm Deep brach of radial nerve (C6-C7) radial recurrent and posterior interosseous arteries

Question 34

Extensor carpi radialis brevis muscle

Answer 34

extends and abducts hand at wrist Deep branch of radial nerve radial artery and radial recurrent artery

Question 35

extensor carpi ulnaris

Answer 35

extends and abducts hand at wrist Posterior interosseous nerve Posterior interosseous artery

Question 36

Extensor digiti minimi muscle

Answer 36

Extends fifth digit posterior interosseous nerve posterior interosseous artery

Question 37

Extensor indicis muscle

Answer 37

Extends second digit Posterior interosseous nerve posterior interosseous artery

Question 38

Extensor pollicis longus muscle

Answer 38

Extends distal phalanx of thumb Posterior interosseous nerve Posterior interosseous artery

Question 39

Abductor pollicis longus muscle

Answer 39

Abducts and extends thumb Posterior interosseous nerve Posterior interosseous artery

Question 40

Extensor pollicis brevis muscle

Answer 40

Extends proximal phalanx of thumb Posterior interosseous nerve Posterior interosseous artery

Question 41

Posterior interosseous nerve

Answer 41

continuation of deep brach of radial nerve distal to lower border of supinator muscle