Anatomy - Upper Limb 2

Question 1

What is the nerve supply for serratus anterior?

Answer 1

Long thoracic nerve

Question 2

What clinical sign is seen when the long thoracic nerve is injured?

Answer 2

Winged scapula

Question 3

During what procedure is the long thoracic nerve commonly injured?

Answer 3

Mastectomy

Question 4

What are the actions of the superior fibres of the trapezius on the scapula?

Answer 4

Elevation

Question 5

What are the actions of the middle fibres of the trapezius on the scapula?

Answer 5

Retraction

Question 6

What are the actions of the inferior fibres of the trapezius on the scapula?

Answer 6

Depression

Question 7

What is the innervation of the trapezius muscle?

Answer 7

CNXI Accessory nerve

Question 8

What are the actions of teres major on the shoulder joint?

Answer 8

Adduction and medial rotation of the humerus

Question 9

What are the actions of latissimus dorsi on the shoulder joint?

Answer 9

Adduction, extension and internal rotation of the humerus

Question 10

What are the two heads of the biceps brachii known as?

Answer 10

Short and long heads

Question 11

Which head of the biceps arises from the coracoid process along with the coracobrachialis?

Answer 11

Short head

Question 12

Which head of the biceps arises from the supraglenoid tubercle and runs in the bicipital groove of the humerus?

Answer 12

Long head

Question 13

To which bony process of the radius is the tendon of biceps attached distally?

Answer 13

Radial tuberosity

Question 14

What is the action of biceps on both the shoulder and elbow joints?

Answer 14

Flexion

Question 15

What is the action of biceps on the superior radio-ulnar joint?

Answer 15

Supination

Question 16

What is the nerve supply to the biceps muscle?

Answer 16

Musculocutaneous nerve

Question 17

Which segmental fibres (cervical segments) mainly innervate the biceps brachii muscle?

Answer 17

C5-7 - but mainly C6

Question 18

From which cord of the brachial plexus does the musculocutaneous nerve arise?

Answer 18

Lateral cord

Question 19

What are the origin and insertion of coracobrachialis?

Answer 19

Tip of the coracoid process to the medial margin of the humerus around the middle

Question 20

What is the action of coracobrachialis on the shoulder joint?

Answer 20

Draws the humerus forwards - shoulder flexion

Draws the humerus towards the torso - shoulder adduction

Question 21

What is the nerve supply of coracobrachialis?

Answer 21

Musculocutaneous nerve

Question 22

What is the main action of brachialis on the elbow joint?

Answer 22

Flexion

Question 23

Which nerve supplies the brachialis muscle?

Answer 23

Musculocutaneous nerve

Question 24

What is the segmental or root value of the musculocutaneous nerve?

Answer 24

C5-7

Question 25

What are the three muscles supplied by the musculocutaneous nerve?

Answer 25

Biceps brachii Brachialis Coracobrachialis

Question 26

Where does the brachial artery begin?

Answer 26

Lower border of teres major

Question 27

Does the median nerve supply any muscles in the arm?

Answer 27

No

Question 28

Does the musculocutaneous nerve supply any muscles in the forearm or hand?

Answer 28

No

Question 29

Does the ulnar nerve innervate any muscles in the arm?

Answer 29

No

Question 30

Which artery is responsible for the pulsation felt in the cubital fossa?

Answer 30

Brachial

Question 31

The olecranon process and coronoid process are parts of which bone?

Answer 31

Ulna

Question 32

Which head of the triceps has its proximal attachment on the infraglenoid tubercle of the scapula?

Answer 32

Long head

Question 33

What is the main action of the triceps on the elbow joint?

Answer 33

Extension

Question 34

What is the action of the anconeus muscle on the elbow joint?

Answer 34

Extension

Question 35

What is the nerve supply to the triceps and the anconeus?

Answer 35

Radial nerve

Question 36

What is the root value of the radial nerve?

Answer 36

C7 and 8

Question 37

Which branch of the brachial artery accompanies the radial nerve in the radial groove?

Answer 37

Deep brachial

Question 38

What is the characteristic clinical sign of a radial nerve injury?

Answer 38

Wrist drop

Question 39

Which ligament holds the head of the radius in place?

Answer 39

Annular ligament

Question 40

What are the three flexors of the elbow joint?

Answer 40

Brachialis Biceps brachii Brachioradialis

Question 41

What are the two extensors of the elbow joint?

Answer 41

Triceps brachii | Anconeus

Question 42

What are the two main supinators?

Answer 42

Supinator | Biceps brachii

Question 43

What are the two main pronators?

Answer 43

Pronator teres | Pronator quadratus

Question 44

Which muscle is the most powerful supinator?

Answer 44

Biceps brachii

Question 45

Which muscle is the most powerful pronator?

Answer 45

Pronator quadratus

Question 46

What are the actions of serratus anterior?

Answer 46

Protracts and rotates the scapula

Question 47

What is the innervation of the deltoid muscle?

Answer 47

Axillary nerve

Question 48

Which nerve is most likely to be fractured at the radial groove?

Answer 48

Radial nerve

Question 49

What are the actions of teres major?

Answer 49

Adduction and medial rotation of the arm

Question 50

What is the innervation of biceps brachii?

Answer 50

Musculocutaneous nerve

Question 51

Which cord of the brachial plexus does the musculocutaneous nerve come from?

Answer 51

Lateral

Question 52

What is the function of the coracoacromial ligament?

Answer 52

Prevent upper displacement of the humeral head

Question 53

Which type of joint is the superior radio-ulnar?

Answer 53

Synovial pivot

Question 54

Which nerve innervates the supinator?

Answer 54

Radial nerve

Question 55

What are the functions of the glenoid labrum?

Answer 55

Deepens the glenoid cavity and provides shock absorption