The Elbow Muscles

Question 1

What flexes the elbow, biceps brachii and brachialis supplied by musculocutaneous nerve, brachioradialis supplied by radial nerve

Answer 1

Biceps brachii, brachioradialis, brachialis

Question 2

What extends the elbow, both supplied by radial nerve

Answer 2

Triceps brachii, aconeus

Question 3

What pronates the forearm, supplied by median nerve and anterior interosseous nerve

Answer 3

Pronator teres, pronator quadratus, brachioradialis

Question 4

Supinator of the forearm, radial nerve

Answer 4

Supinator, brachioradialis

Question 5

Origins, insertions and nerve supply of biceps brachii

Answer 5

Origins: long head from coracoid process, short head from infraglenoid tubercle above humerus
Insertions: tuberosity of radius
Nerve supply: musculo cutaneous nerve

Question 6

Origins, insertions and nerve supply of brachialis, ulna

Answer 6

Origins: distal 1/2 of ulna
Insertions: tuberosity of ulna
Nerve supply: musculocutaneous nerve

Question 7

Origins, insertions and nerve supply of brachioradialis, radius

Answer 7

Origins: lateral side of radius, proximal to radial styloid process
Insertions: lateral side of forearm, lateral supracondylar ridge of humerus
Nerve supply: radial nerve

Question 8

Origins, insertions and nerve supply of triceps brachii

Answer 8

Origins: long head- infraglenoid tubercle above humerus 
 Medial head- upper shaft of humerus 
Short head- lower shaft of humerus 
Insertions: olecranon of ulna 
Nerve supply: radial nerve

Question 9

Origins, insertions and nerve supply of aconeus, lateral

Answer 9

Origins: lateral epicondyle of humerus
Insertions: olecranon and upper shaft of ulna
Nerve supply: radial nerve

Question 10

Origins, insertions and nerve supply of pronator quadratus, interosseous, distal

Answer 10

Origins: distal part, anterior shaft of ulna
Insertions: distal part, anterior shaft of radius
Nerve supply: anterior interosseous nerve

Question 11

Origins, insertions and nerve supply of pronator teres, median/ middle

Answer 11

Origins: medial epicondyle and coronoid process of ulna
Insertions: middle of lateral surface of radius
Nerve supply: median nerve

Question 12

What are the origins, insertions and nerve supply of supinator, lateral

Answer 12

Origins: lateral epicondyle of humerus, radial collateral and annular ligament, supinator fossa and crest of ulna
Insertions: post NS anterior surface of proximal 1/3 of radius
Nerve supply: radial nerve