Arm

Question 1

Coracobrachialis

Answer 1

Origin: Coracoid process

Insertion: Medial midshaft of humerus

Action: GHJ flexion, adduction

Innervation: Musculocutaneous Nerve (C5, C6)

Question 2

Biceps Brachii Long Head

Answer 2

Origin: Supraglenoid tubercle, superior GHJ labrum

Insertion: Radial tuberosity

Action: GHJ flexion, elbow flexion, forearm supination

Innervation: Musculocutaneous Nerve (C5,C6)

Question 3

Biceps Brachii Short Head

Answer 3

Origin: Coracoid process

Insertion: Radial tuberosity

Action: Elbow flexion, forearm supination

Innervation: Musculocutaneous Nerve (C5, C6)

Question 4

Brachialis

Answer 4

Origin: Anterior humerus

Insertion: Ulnar tuberosity

Action: Elbow flexion

Innervation: Musculocutaneous Nerve (C5, C6)

Question 5

Triceps Brachii Long Head

Answer 5

Origin: Infraglenoid tubercle

Insertion: Olecranon process of ulna

Action: GHJ extension, elbow extension

Innervation: Radial Nerve (C6, C7, C8)

Question 6

Triceps Brachii Lateral Head

Answer 6

Origin: Humerus lateral and proximal to radial groove

Insertion: Olecranon process of ulna

Action: Elbow extension

Innervation: Radial Nerve (C6, C7, C8)

Question 7

Triceps Brachii Medial Head

Answer 7

Origin: Humerus distal and medial to radial groove

Insertion: Olecranon process of ulna

Action: Elbow extension

Innervation: Radial Nerve (C6, C7, C8)

Question 8

Anconeus

Answer 8

Origin: Lateral epicondyle of humerus

Insertion: Lateral surface of olecranon and
posterior proximal ulna

Action: Retracts joint capsule during elbow extension, abduction of ulna in pronation, posterolateral stability

Innervation: Radial nerve (C6–8)