MOINA Muscles of the Arm

Question 1

long head of biceps brachii

Answer 1

origin: supraglenoid tubercle of scapula
insertion: tuberosity of radius and bicipital aponeurosis into deep fascia of the forearm

nerve: musculocutaneous nerve

supinator of the forearm and flexor of the elbow joint; weak flexor of the shoulder joint

Question 2

short head of the biceps brachii

Answer 2

coracoid process of scapula

Question 3

coracobrachialis

Answer 3

origin: coracoid process of scapula
insertion: medial aspect of shaft of humerus

nerve: musculocutaenous nerve

flexes the arm and is a weak adductor

Question 4

long head of triceps

Answer 4

infraglenoid tubercle of scapula

Question 4

brachialis

Answer 4

origin: front of lower half of humerus
insertion: coronoid process of ulna

nerve: musculocutaenous nerve

flexor of elbow joint

Question 5

lateral head of triceps

Answer 5

origin: upper half of posterior surface of shaft of humerus
insertion: olecranon process of ulna

nerve: axillary nerve

extensor of elbow joint

Question 6

medial head of triceps

Answer 6

lower half of posterior surface of shaft of humerus