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Exam 2 > Muscles of arm > Flashcards

Muscles of arm Flashcards

0
Q

Biceps insertion

A

Tuberosity of radius and fascia of forearm via bicipital aponeurosis

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1
Q

Biceps brachii origin

A

Short head - tip of coracoid process of scapula

Long head - supraglenoid tubercle of scapula

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2
Q

Biceps brachii innervation

A

Musculocutaneous nerve (C5, C6)

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3
Q

Biceps brachii action

A

Supinates forearm and, when it is supinated, flexes elbow joint
Flexes shoulder joint
Short head resists dislocation of shoulder

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4
Q

Brachialis origin

A

Distal half of anterior surface of humerus

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5
Q

Brachialis insertion

A

Coronoid process and tuberosity of ulna

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6
Q

Brachialis innervation

A

Musculocutaneous nerve (C5, C6)

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7
Q

Brachialis action

A

Flexes elbow joint in all positions

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8
Q

Coracobrachialis origin

A

Tip of coracoid process of scapula

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9
Q

Coracobrachialis insertion

A

Middle third of medial surface humerus

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10
Q

Coracobrachialis innervation

A

Musculocutaneous nerve (C5, C6, C7)

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11
Q

Coracobrachialis actions

A

Helps flex and adduct shoulder joint

Resists dislocation of shoulder

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12
Q

Triceps brachii origin

A

Long head - ingraglenoid 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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13
Q

Triceps brachii insertion

A

Proximal end of olecranon of ulna and fascia of forearm

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14
Q

Triceps brachii innervation

A

Radial nerve (C6, C7, C8)

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15
Q

Triceps brachii action

A

Chief extensor of elbow joint

Long head extends shoulder joint and resists dislocation of humerus (especially important during abduction)

16
Q

Anconeus origin

A

Lateral epicondyle of humerus

17
Q

Anconeus insertion

A

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

18
Q

Anconeus innervation

A

Radial nerve (C7, C8, T1)

19
Q

Anconeus action

A

Assists triceps in extending elbow joint
Stabilizes elbow joint
Abducts ulna during pronation

Exam 2 (13 decks)

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