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Muscles of back/upper extremity > Arm > Flashcards

Flashcards in Arm Deck (21):
1

Attachments of coracobrachialis

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

2

Actions of coracobrachialis

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

3

Blood supply of coracobrachialis

brachial artery

4

Innervation of coracobrachialis

musculocutaneous nerve (C5, C6, C7)

5

Attachments of short head of biceps brachii

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

6

Attachments of long head of biceps brachii

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

7

Actions of biceps brachii

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

8

Blood supply of biceps brachii

brachial artery

9

Innervation of biceps brachii

musculocutaneous nerve (C5, C6, C7)

10

Attachments of brachialis

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

11

Actions of brachialis

flexes forearm at elbow

12

Blood supply of brachialis

branches of the brachial artery

13

Innervation of brachialis

musculocutaneous nerve (C5, C6, C7)

14

Attachments of triceps brachii

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

15

Actions of triceps brachii

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

antagonist of biceps brachii

16

Innervation of triceps brachii

radial nerve (C6, C7, C8)

17

Attachments of anconeus

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

18

Actions of anconeus

assists triceps in extending forearm, stabilizes elbow

19

Innervation of anconeus

radial nerve (C7, C8, T1)

20

Anterior/flexor compartment of arm

biceps brachii
coracobrachialis
brachialis

21

Posterior/extensor compartment of arm

triceps brachii
anconeus