Arm

Question 1

Attachments of coracobrachialis

Answer 1

Proximal: tip of coracoid process of scapula
Distal: middle third of medial surface of humerus

Question 2

Actions of coracobrachialis

Answer 2

adducts and flexes arm at shoulder (resists shoulder dislocation!)

Question 3

Blood supply of coracobrachialis

Answer 3

brachial artery

Question 4

Innervation of coracobrachialis

Answer 4

musculocutaneous nerve (C5, C6, C7)

Question 5

Attachments of short head of biceps brachii

Answer 5

Proximal: tip of coracoid process of scapula
Distal: radial tuberosity and antebrachial fascia

Question 6

Attachments of long head of biceps brachii

Answer 6

Proximal: supraglenoid tubercle of scapula
Distal: radial tuberosity and antebrachial fascia

Question 7

Actions of biceps brachii

Answer 7

supinates forearm

and when supine, flexes forearm (resists shoulder dislocation!)

Question 8

Blood supply of biceps brachii

Answer 8

brachial artery

Question 9

Innervation of biceps brachii

Answer 9

musculocutaneous nerve (C5, C6, C7)

Question 10

Attachments of brachialis

Answer 10

Proximal: distal half of anterior humerus
Distal: coronoid process of the ulna and ulnar tuberosity

Question 11

Actions of brachialis

Answer 11

flexes forearm at elbow

Question 12

Blood supply of brachialis

Answer 12

branches of the brachial artery

Question 13

Innervation of brachialis

Answer 13

musculocutaneous nerve (C5, C6, C7)

Question 14

Attachments of triceps brachii

Answer 14

Proximal: long head @ infraglenoid tubercle of scapula / lateral head @ posterior humerus superior to radial groove / medial head @ posterior humerus inferior to radial groove
Distal: proximal olecranon

Question 15

Actions of triceps brachii

Answer 15

chief extensor of forearm at elbow (long head resists humerus dislocation)

antagonist of biceps brachii

Question 16

Innervation of triceps brachii

Answer 16

radial nerve (C6, C7, C8)

Question 17

Attachments of anconeus

Answer 17

Proximal: lateral epicondyle of humerus
Distal: lateral surface of olecranon and superior part of posterior ulna

Question 18

Actions of anconeus

Answer 18

assists triceps in extending forearm, stabilizes elbow

Question 19

Innervation of anconeus

Answer 19

radial nerve (C7, C8, T1)

Question 20

Anterior/flexor compartment of arm

Answer 20

biceps brachii
coracobrachialis
brachialis

Question 21

Posterior/extensor compartment of arm

Answer 21

triceps brachii

anconeus