UL: Arm

Question 1

Muscles innervated by radial nerve

Answer 1

BEST
Brachiradialis

Extensors

Supenator

Triceps

Question 2

Anterior view of distal humerus

Answer 2

Note difference between condyle and epicondyle

Capitulum- radius

Trochlea- ulna

Question 3

Posterior view of distal humerus

Answer 3

Question 4

Proximal radius parts

Answer 4

Question 5

Proximal ulna parts

Answer 5

Question 6

Muscles of anterior compartment of the arm

Answer 6

Coracobrachialis

Biceps brachii

Brachialis

Question 7

Origin and insertion of coracobrachialis

Answer 7

coracoid process to medial humerus

Question 8

Origin and insertion of biceps brachii

Answer 8

Long head: supraglenoid tubercle. Short head: apex of coracoid process

To radial tuberosity

Question 9

Origin and insertion of brachialis

Answer 9

Anterior humerus to tuberosity of ulna

Question 10

Innervation of arm anterior compartment

Answer 10

musculocutaneous

Question 11

Action of coracobrachialis

Answer 11

Shoulder flexion

Question 12

Action of biceps brachi

Answer 12

Elbow flexion

Supination

(shoulder flexion)

Question 13

Action of brachialis

Answer 13

Elbow flexion

Assists pronation

Question 14

Origin and insertion of triceps brachii

Answer 14

Long head- infraglenoid tubercle

Medial head- posterior humerus

Lateral head- posterior humerus

to olecranon

Question 15

Triceps innervation

Answer 15

Radial nerve

Question 16

Action of triceps

Answer 16

Elbow extension

Shoulder adduction and extension

Question 17

Brachial artery branches

Answer 17

Question 18

Veins of arm

Answer 18

Question 19

Nerves of anterior arm

Answer 19

Question 20

Nerves of posterior arm

Answer 20

Question 21

Borders of anterior cubital fossa

Answer 21

Pronator teras

Inter epicondylar line

Brachioradialis

Question 22

Floor of ACF

Answer 22

Brachialis

Supinators

Question 23

Ligaments of elbow

Answer 23

Question 24

Relations of nerves and arteries in ACF

Answer 24

Medial to lateral:

median nerve, brachial artery, biceps, radial nerve

Question 25

Cubital tunnel

Answer 25

Ulnar nerve enters the forearm through this

Wrapped between the two heads of flexor carpi ulnaris

Ulnar nerve could get trapped and require release

2nd most common cause of entrapped nerve in upper limb (after carpal tunnel)

Question 26

Borders of cubital tunnel

Answer 26

Medial: Medial epicondyle

Lateral/posterior: olecranon

(insertions of 2 heads flexor carpi ulnaris)

Roof: cubital tunnel retinaculum

floor: capsule of elbow joint

Question 27

Roof of ACF

Answer 27

Apponeurosis of biceps brachii