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Anatomy - HSC501 > Muscles of the Arm > Flashcards

Muscles of the Arm Flashcards

1
Q

Biceps Brachii - Origin

A

Short Head: tip if coracoid process of scapula

Long Head: supragelnoid tubercle of scapula

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2
Q

Biceps Brachii - Insertion

A

Tuberosity of radius and fascia of forearm via bicipital aponeurosis

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3
Q

Biceps Brachii - Innervation

A

Musculocutaneous nerve (C5, C6)

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4
Q

Biceps Brachii - Action(s)

A

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

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5
Q

Brachialis - Origin

A

Distal half of anterior surface of humerus

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6
Q

Brachialis - Insertion

A

Coronoid process and tuberosity of ulna

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7
Q

Brachialis - Innervation

A

Musculocutaneous Nerve (C5, C6)

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8
Q

Brachialis - Action(s)

A

Flexes elbow joint in all positions

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9
Q

Coracobrachialis - Origin

A

Tip of coracoid process of scapula

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10
Q

Coracobrachialis - Insertion

A

Middle third of medial surface of humerus

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11
Q

Coracobrachialis - Innervation

A

Musculocutaneous Nerve (C5, C6, C7)

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12
Q

Coracobrachialis - Action(s)

A

Helps flex and adduct shoulder joint

Resists dislocation of shoulder

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13
Q

Triceps Brachii - Origin

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

Triceps Brachii - Insertion

A

Proximal end of olecranon of ulna and fascia of forearm

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15
Q

Triceps Brachii - Innervation

A

Radial Nerve (C6, C7, C8)

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16
Q

Triceps Brachii - Action(s)

A

Chief extensor of elbow joint

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

17
Q

Anconeus - Origin

A

Lateral epicondyle of humerus

18
Q

Anconeus - Insertion

A

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

19
Q

Anconeus - Innervation

A

Radial nerve (C7, C8, T1)

20
Q

Anconeus - Action(s)

A

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

Anatomy - HSC501 (18 decks)

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