Flexors and Extensors of the elbow

Question 1

What compromises the radio ulnar joint

Answer 1

Radial notch of ulnar and head of radius

Question 2

When dislocations of the elbow happen in which direction is this most common?

Answer 2

Posteriorly 80-90% distal humerus is driven through weak anterior joint capsule

Question 3

What does the anular ligament do and where is it?

Answer 3

Wraps around head of radius and mainstains stability allows rotation of radius during pronation and supination.

Question 4

Nursemaids elbows is what and affects who?

Answer 4

Under 4 weak ligaments swinging children by arms

Question 5

The radial collateral ligament is positioned where?

Answer 5

Laterally

Question 6

The ulnar ligament is positioned where?

Answer 6

Medially

Question 7

Why is the elbow capsule loose anterior and posteriorly?

Answer 7

Allows flexion and extension

Question 8

if a person is able to hyperextend there elbow what has happened?

Answer 8

There is an olecronon foramen instead of fossa

Question 9

What is the origin of coracobrachialis?

Answer 9

Apex of the coracoid process

Question 10

What is the action of coracobrachialis?

Answer 10

Flexion of arm at glenohumeral joint

Question 11

What is the insertion of coracobrachialis?

Answer 11

Linear roughening midshaft medial side of humerus

Question 12

What are the origins of the short and long heads of biceps brachii?

Answer 12

Supraglenoid tubercle (long) and coracoid process (short)

Question 13

Where does biceps insert?

Answer 13

Radial tuberosity (bicipital groove)

Question 14

Biceps is the main what of the arm?

Answer 14

Supinator

Question 15

The roof of the cubital fossa is formed by what?

Answer 15

Bicipital aponeurosis

Question 16

What is the origin of brachialis?

Answer 16

Anterior aspect of the humerus mid way down

Question 17

What is the insertion of brachialis?

Answer 17

Ulna tuberosity

Question 18

The action of brachialis?

Answer 18

Main flexor of forearm

Question 19

What is the origin of the long head of triceps brachii?

Answer 19

Infraglenoid tubercle

Question 20

What is the origin of the medial head of triceps?

Answer 20

inferior 2/3 of the humerus posteriorly

Question 21

What are the insertions for triceps?

Answer 21

Olecranon process

Question 22

Where does the lateral head of triceps originate?

Answer 22

Proximal portion of posterior humerus above radial groove

Question 23

Action of long head of triceps?

Answer 23

Extend and adduct arm at shoulder

Question 24

The lateral and medial heads of triceps actions?

Answer 24

Extension of the forearm at the elbow

Question 25

Which artery supplies the posterior compartment of triceps?

Answer 25

Profunda brachii