GA3

Question 1

Biceps Brachii
Origin
Insertion
Innervation
Action

Answer 1

Origin of short head: coracoid process
Origin of long head: superior to glenoid tubercle
Insertion: both long and short insert on the radial tuberosity of the radius
Innervation: musculocutaneous nerve (C5, 6, 7)
Action: Flexion of elbow, supination of forearm, flexion of shoulder joint

Question 2

Brachialis
Origin
Insertion
Innervation
Action

Answer 2

Origin: anterior distal humerus
Insertion: coronoid process of ulna
Innervation: musculocutaneous nerve (C5, 6, 7)
Action: flexion of forearm (the only pure flexor)

Question 3

Coracobrachialis
Origin
Insertion
Innervation
Action

Answer 3

Origin: coracoid process of scapula
Insertion: medial surface of humerus
Innervation: musculocutaneous (C5, 6, 7)
Action: Flexion and Adduction of arm, stabilization of shoulder joint

Question 4

The musculocutaneous nerve becomes which nerve of the forearm?

Answer 4

Lateral cutaneous nerve

Question 5

The anterior compartment of the arm receives blood supply mainly from which artery?

Answer 5

Brachial artery

Question 6

The _____ artery becomes the _____artery once it passes distal to the lower border of the teres major muscle?

Answer 6

axillary artery becomes the brachial