Muscles Of The Arm Flashcards

1
Q

Biceps Brachii Origin

A

Long Head: supraglenoid tubercle of scapula

Short Head: Coracoid process of the scapula (Anterior Lateral)

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2
Q

Biceps Brachii Insertion

A

Both heads converge to a single tendon that inserts on the radial tuberosity and the bicipital aponeurosis.

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3
Q

Biceps Brachii Innervation

A

Musculocutaneus Nerve (C5, C6)

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4
Q

Biceps Brachii Action

A

Long Head: Supinates forearm, flexes supinated elbow, flexes shoulder

Short Head: Resists shoulder dislocation

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5
Q

Biceps Brachii Arterial Supply

A

Brachial Artery and anterior circumflex humeral arteries

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6
Q

Brachialis Origin

A

Distal half of the anterior surface of the humerus

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7
Q

Brachialis Insertion

A

Coronoid process and the tuberosity of the ulna

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8
Q

Brachialis Innervation

A

Musculocutaneous (C5, C6)

Radial Nerve has minor role in innervating lateral part

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9
Q

Brachialis Action

A

Flexion of the forearm at the elbow joint

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10
Q

Brachialis Arterial Supply

A

Brachial artery, radial recurrent anterior artery

Inferior ulnar collateral anterior artery

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11
Q

Coracobrachialis Origin

A

Coracoid process of the scapula

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12
Q

Coracobrachialis Insertion

A

Middle 1/3 of the medial surface of the humerus

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13
Q

Coracobrachialis Innervation

A

Musculocutaneous Nerve (C5, C6)

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14
Q

Coracobrachialis Action

A

Adduction of the arm, flexion of the arm at the shoulder joint, resists shoulder dislocation

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15
Q

Coracobrachialis Arterial Supply

A

Brachial artery

Anterior circumflex humeral artery

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16
Q

Triceps Brachii Origin

A

Long head: infraglenoid tubercle of the scapula

Medial Head: posterior surface of the humerus (inferior to radial groove)

Lateral head: posterior surface of the humerus (superior to radial groove

17
Q

Triceps Brachii Insertion

A

Olecranon of the ulna

Fascia of the forearm

18
Q

Triceps Brachii Innervation

A

Radial Nerve (C6-C8)

19
Q

Triceps Brachii Action

A

Elbow Joint: Extension of the forearm

Shoulder Joint: Extension and adduction of the arm (long head)

20
Q

Triceps Brachii Arterial Supply

A

Deep brachial artery

Superior ulnar collateral artery

Posterior circumflex humeral artery

21
Q

Anconeus Origin

A

Lateral Epicondyle of the Humerus

22
Q

Anconeus Insertion

A

Lateral surface of olecranon and superior part of the posterior surface of the ulna

23
Q

Anconeus Innervation

A

Radial nerve (C7, C8, T1)

24
Q

Anconeus Action

A

Assists triceps in elbow extension, stabilizes elbow joint, abducts elbow during pronation

25
Q

Anconeus Arterial Supply

A

Recurrent interosseous artery