Arm Muscles

Question 0

Brachialis

Answer 0

Origin: Distal half of anterior surface of humerus

Insertion: Coranoid process and tuberosity of ulna

Innervation: Musculocutaneous Nerve (C5, C6)

Question 1

Biceps Brachii

Answer 1

Origin: (Short Head) Tip of the coracoid process of scapula.
(Long Head) Supraglenoid tubercle of scapula

Insertion: Tuberosity of radius and fascia of forerarm via biciptial aponeurosis

Innervation: Musculocutaneous Nerve (C5, C6)

Question 2

Coracobrachialis

Answer 2

Origin: Tip of coracoid process of scapula

Insertion: Middle third of medial surface of humerus

Innervation: Musculocutaneous Nerve (C5, C6, C7)

Question 3

Triceps Brachii

Answer 3

Origin: (Long Head) Infraglenoid tubercle of scapula
(Lateral Head) Posterior surface of humerus, superior to radial groove
(Medial Head) Posterior surface of the humerus, inferior to radial groove

Insertion: Posterior end of olecrenon of ulna facia of forearm

Innervation: Radial Nerve (C6, C7, C8)

Question 4

Anconeus

Answer 4

Origin: Lateral epicondyle of humerus

Insertion: Lateral surface of olecrenon and superior part of posterior surface of ulna

Innervation: Radial Nerve (C7, C8, T1)