Arm Flashcards

1
Q

Attachments of coracobrachialis

A

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

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2
Q

Actions of coracobrachialis

A

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

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3
Q

Blood supply of coracobrachialis

A

brachial artery

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4
Q

Innervation of coracobrachialis

A

musculocutaneous nerve (C5, C6, C7)

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5
Q

Attachments of short head of biceps brachii

A

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

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6
Q

Attachments of long head of biceps brachii

A

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

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7
Q

Actions of biceps brachii

A

supinates forearm

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

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8
Q

Blood supply of biceps brachii

A

brachial artery

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9
Q

Innervation of biceps brachii

A

musculocutaneous nerve (C5, C6, C7)

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10
Q

Attachments of brachialis

A

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

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11
Q

Actions of brachialis

A

flexes forearm at elbow

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12
Q

Blood supply of brachialis

A

branches of the brachial artery

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13
Q

Innervation of brachialis

A

musculocutaneous nerve (C5, C6, C7)

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14
Q

Attachments of triceps brachii

A

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

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15
Q

Actions of triceps brachii

A

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

antagonist of biceps brachii

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16
Q

Innervation of triceps brachii

A

radial nerve (C6, C7, C8)

17
Q

Attachments of anconeus

A

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

18
Q

Actions of anconeus

A

assists triceps in extending forearm, stabilizes elbow

19
Q

Innervation of anconeus

A

radial nerve (C7, C8, T1)

20
Q

Anterior/flexor compartment of arm

A

biceps brachii
coracobrachialis
brachialis

21
Q

Posterior/extensor compartment of arm

A

triceps brachii

anconeus