Ch 6 Elbow & Radioulnar

Question 1

Memorize pictures

Answer 1

On powerpoint

Question 2

Is radius or ulna larger proximally?

Answer 2

Ulna

Question 3

Is radius or Ulna larger distally?

Answer 3

Radius

Question 4

What are the attachment sites for elbow and radioulnar joint muscles?

Answer 4

Scapula, humerus, radius, and ulna

Question 5

Elbow is known as what type of joint? Why?

Answer 5

Ginglymus ; thought of as 2 joints

Question 6

Elbow motions primarily involvement movement at the

Answer 6

Humeroulnar

Question 7

Learn the humerus photos

Question 8

What are the elbow movements? What are the radioulnar movements?

Answer 8

Flexion and extension ; pronation and supination

Question 9

What are the anterior elbow and radioulnar muscles?

Answer 9

Biceps brachii, brachialis, brachioradialis, pronator Teres, pronator quadratus

Question 10

What are the posterior elbow and radioulnar muscles?

Answer 10

Triceps brachii, anconeus, supinator

Question 11

What is the origin of biceps brachii? What is the insertion? (Origin same as coracobrachialis)

Answer 11

Coracoid process & supraglenoid tubercle ; radial tuberosity and bicipital aponeurosis

Question 12

What are the actions of biceps brachii?

Answer 12

Elbow flexion

Question 13

What is the origin of brachialis? The insertion?

Answer 13

Distal anterior portion of humerus ; coranoid process of ulna

Question 14

What is the action of brachialis?

Answer 14

Elbow flexion

Question 15

What is the origin of brachioradialis? What is the insertion?

Answer 15

Distal 2/3 of lateral condyloid (also called supracondylar) ridge of humerus ; lateral distal end of radius at styloid process

Question 16

What is the action of brachioradialis?

Answer 16

Wrist/forearm pronation and supination

Question 17

What are the origins of triceps brachii?

Answer 17

Infraglenoid tubercle of scapula ; upper half posterior surface of humerus ; distal 2/3 posterior surface of humerus

Question 18

What is the insertion of triceps brachii?

Answer 18

Olecranon process of ulna

Question 19

What is the action of triceps brachii?

Answer 19

Elbow extension

Question 20

What is the origin of anconeus? What is the insertion?

Answer 20

Lateral condole of humerus on posterior surface ; upper ulna on posterior surface

Question 21

What is the action of anconeus?

Answer 21

Elbow extension

Question 22

What is the origin of pronator Teres?

Answer 22

Distal part of medial condyloid ridge of humerus AND medial side of proximal ulna

Question 23

What is the insertion of pronator Teres?

Answer 23

Middle third of lateral surface of radius

Question 24

What is the action of pronator Teres?

Answer 24

Wrist pronation

Question 25

What is the origin of pronator quadratus? What is the insertion?

Answer 25

Distal fourth of anterior ulna ; distal fourth of anterior radius

Question 26

What is the action of pronator quadratus?

Answer 26

Wrist/forearm pronation

Question 27

What are the origins of supinator?

Answer 27

Lateral epicondyle of humerus ; neighboring posterior ulnar

Question 28

What is the insertion of supinator?

Answer 28

Lateral surface of proximal radius

Question 29

What is the action of supinator?

Answer 29

Supination of forearm