myology of the elbow

Question 1

biceps brachii origins

Answer 1

long head- supraglenoid tubercle on scapula
short head- apex of coracoid process of scapula

Question 2

biceps brachii insertion

Answer 2

2 bellies fuse and common tendon inserts into posterior part of radial tuberosity

Question 3

biceps brachii nerve supply

Answer 3

musculocutaneous nerve C5,6

Question 4

biceps brachii action

Answer 4

elbow flexion and forearm supination

Question 5

triceps brachii action

Answer 5

elbow extension

Question 6

triceps brachii origins

Answer 6

long head- infraglenoid tubercle of scapula and glenoid labrum
medial head- posterior surface of humerus (below and medial to spiral groove)
lateral head- posterior surface of humerus (above and lateral to spiral groove)

Question 7

triceps brachii insertioin

Answer 7

posterior surface olecranon of ulna and deep fascia of forearm

Question 8

triceps brachii nerve supply

Answer 8

radial nerve C6,7,8

Question 9

Brachialis action

Answer 9

main flexor of elbow

Question 10

brachialis origin

Answer 10

distal 2/3rds anterior surface of humerus

Question 11

brachialis insertion

Answer 11

inferior part coronoid process and tuberosity of ulna

Question 12

brachiais nerve supply

Answer 12

muscuocutaneous nerve C5,6

Question 13

Brachioradialis actioin

Answer 13

powerful flexor of elbow with forearm in mid position

Question 14

brachioradialis origin

Answer 14

upper 2/3rds anterior lateral supracondylar ridge of humerus

Question 15

brachioradialis insertion

Answer 15

lateral surface of radius

Question 16

brachioradialis nerve supply

Answer 16

radial nerve C5,6

Question 17

anconeus action

Answer 17

assists triceps in elbow extension

Question 18

anconeus origin

Answer 18

posterior surface lateral epicondyle of humerus

Question 19

anconeus insertion

Answer 19

lateral surface olecranon and posterior surface of ulna

Question 20

anconeus nerve supply

Answer 20

radial nerve C7,8

Question 21

supinator action

Answer 21

supinates arm in any position

Question 22

supinator origin

Answer 22

lateral epicondyle of humerus, supinator crest of ulna

Question 23

supinator insertion

Answer 23

posterior, lateral and anterior aspects upper 3rd of radius

Question 24

supinator nerve supply

Answer 24

posterior interrosseous branch of radial nerve C5,6

Question 25

Pronator teres action

Answer 25

pronates forearm and weakly flexes elbow

Question 26

pronator teres origin

Answer 26

common flexor origin, medial epicondyle humerus, pronator ridge of ulna

Question 27

pronator teres insertion

Answer 27

middle lateral surface of radius

Question 28

pronator teres nerve supply

Answer 28

median nerve C6,7

Question 29

Pronator quadratus origin

Answer 29

lower quarter anterior surface of radius

Question 30

pronator quadratus insertion

Answer 30

lower quarter anterior surface of radius