The Elbow

Question 1

Prime movers of elbow flexion (3)

Answer 1

Biceps brachii
brachialis
brachioradialis

Question 2

Brachialis insertions

prime flexor

Answer 2

O: anterior distal part of the humerus
I: ulnar tuberosity and anterior surface of the coronoid process

Question 3

Brachioradialis insertions

prime flexor

Answer 3

O: ridge superior to lateral epicondyle of the humerus and the lateral intermuscular septum
I: lateral side of the base of the styloid process of the radius

Question 4

Nerve innervation - brachialis

Answer 4

musculocutaneous nerve (C5, C6), and a branch of the radial nerve

Question 5

nerve innervation - brachioradialis

Answer 5

radial nerve (C5, C6)

Question 6

biceps brachii - innervation

Answer 6

musculocutaneous nerve (C5, C6)

Question 7

Where does the ulnar nerve commonly get trapped? (2)

Answer 7

retrocondylar groove of the humerus

cubital tunnel

Question 8

Where does the median nerve get entrapped? (3)

Answer 8

lacitus fibrosis
pronator teres
flexor digitorum superficialis arch