Upper Limb Muscles 2

Question 1

What is the origin of the biceps brachii long head?

Answer 1

Supraglenoid tubercle of the scapula

Question 2

What is the insertion of the biceps brachii long head?

Answer 2

Radial tuberosity

Question 3

What is the innervation of the biceps brachii long head?

Answer 3

Musculocutaneous nerve

Question 4

What is the action of the biceps brachii long head?

Answer 4

Flexion of the elbow joint, supination, adduction and internal rotation of humerus

Question 5

What is the origin of the biceps brachii short head?

Answer 5

Coracoid process of scapula

Question 6

What is the insertion of the biceps brachii short head?

Answer 6

Radial tuberosity

Question 7

What is the innervation of the biceps brachii short head?

Answer 7

Musculocutaneous nerve

Question 8

What is the origin of the brachialis muscle?

Answer 8

distal anterior surface of the humerus

Question 9

What is the insertion of the brachialis muscle?

Answer 9

Coronoid process of the ulna

Question 10

What is the innervation of the brachialis muscle?

Answer 10

Musculocutaneous nerve and radial nerve

Question 11

What is the action of the brachialis muscle?

Answer 11

Flexion of the elbow to flex the forearm

Question 12

What is the origin of the brachioradialis muscle?

Answer 12

Proximal two thirds of the lateral suprachondylar ridge of the distal humerus and lateral intermuscular septum

Question 13

What is the insertion of the brachioradialis muscle?

Answer 13

Lateral part of the styloid process of the radius

Question 14

What is the innervation of the brachioradialis muscle?

Answer 14

Radial nerve

Question 15

What is the action of the brachioradialis muscle?

Answer 15

Accessory flexor of the forearm, supination and pronation of forearm

Question 16

What is the origin of the pronator teres muscle?

Answer 16

2 heads

• ulnar head origin - coronoid process of ulna
• humeral head origin - medial epicondyle of the humerus

Question 17

What is the insertion of the pronator teres muscle?

Answer 17

Midway along the lateral surface of the radius

Question 18

What is the innervation of the pronator teres muscle?

Answer 18

Median nerve

Question 19

What is the action of the pronator teres muscle?

Answer 19

Weak flexion of elbow joint and pronation of the forearm

Question 20

What is the origin of the trapezius muscle?

Answer 20

Skull, nuchal ligament and the spinous process C7-T12

Question 21

What is the insertion of the trapezius muscle?

Answer 21

Clavicle, acromion and scapula spine

Question 22

What is the innervation of the trapezius muscle?

Answer 22

Accessory nerve and the proprioceptive fibres from C3-C4

Question 23

What is the action of the trapezius muscle?

Answer 23

Retraction, superior rotation, elevation and depression of the scapula

Question 24

What is the origin of the latissimus dorsi?

Answer 24

Spinous processes of T6-T12, iliac crest, thoraclumbar fascia and inferior 3 ribs

Question 25

What is the insertion of the latissimus dorsi?

Answer 25

Crest of the lesser tuberosity of the humerus and the intertubercular groove

Question 26

What is the innervation of the latissimus dorsi?

Answer 26

Thoracodorsal nerve C6-8

Question 27

What is the action of the latissimus dorsi?

Answer 27

Extends, addicts and medially rotates the humerus

Question 28

What is the origin of the levator scapulae muscle?

Answer 28

Transverse process of vertebrae C1 - C4

Question 29

What is the insertion of the levator scapulae muscle?

Answer 29

Superior portion of the medial border of the scapula

Question 30

What is the innervation of the levator scapulae muscle?

Answer 30

Dorsal scapular nerve C5 and C3 C4 nerve

Question 31

What is the action of the levator scapulae muscle?

Answer 31

Involved in flexing head and neck laterally