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Muscles > Arm > Flashcards

Arm Flashcards

1
Q

What are the proximal attachments of the biceps brachii?

A

Short head: Tip of coracoid process of scapula

Long head: Supraglenoid tubercle of scapula

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2
Q

What is the distal attachment of the biceps brachii?

A

Tuberosity of radius and fascia of forearm via bicipital aponeurosis

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3
Q

What is the innervation of the biceps brachii?

A

Musculocutaneous nerve (C5, C6, C7)

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4
Q

What is the muscle action of the biceps brachii?

A

Supinates forearm and, when supine, flexes forearm; short head resists dislocation of shoulder

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5
Q

What is the proximal attachment of the coracobrachialis?

A

Tip of coracoid process of scapula

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6
Q

What is the distal attachment of the coracobrachialis?

A

Middle third of medial surface of humerus

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7
Q

What is the innervation of the coracobrachialis?

A

Musculocutaneous nerve (C5, C6, C7)

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8
Q

What is the muscle action of the coracobrachialis?

A

Helps flex and adduct arm; resists dislocation of shoulder

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9
Q

What is the proximal attachment of the brachialis?

A

Distal half of anterior surface of humerus

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10
Q

What is the distal attachment of the brachialis?

A

Coronoid process and tuberosity of ulna

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11
Q

What is the innervation of the brachialis?

A

Musculocutaneous nerve (C5, C6) and radial nerve (C5, C7)

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12
Q

What is the muscle action of the brachialis?

A

Flexes forearm in all positions

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13
Q

What is the proximal attachment of the triceps brachii?

A

Long head: infraglenoid tubercle of scapula
Lateral head: posterior surface of humerus, superior to radial groove
Medial head: posterior surface of humerus, inferior to radial groove

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14
Q

What is the distal attachment of the triceps brachii?

A

Proximal end of olecranon of ulna and fascia of forearm

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15
Q

What is the innervation of the triceps brachii?

A

Radial nerve (C6, C7, C8)

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16
Q

What is the muscle action of the triceps brachii?

A

Chief extensor of forearm; long head resists dislocation of humerus; especially important during adduction

17
Q

What is the proximal attachment of the anconeus?

A

Lateral epicondyle of humerus

18
Q

What is the distal attachment of the anconeus?

A

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

19
Q

What is the innervation of the anconeus?

A

Radial nerve (C7, C8, T1)

20
Q

What is the muscle action of the anconeus?

A

Assists triceps in extending forearm; stabilises elbow joint; may abduct ulna during pronation

Muscles (16 decks)

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