Ulna

Question 1

Where is the ulna located in the body?

Answer 1

Forearm

Question 2

What does the ulna sit between?

Answer 2

arm and carpals

Question 3

In what direction does it articulate with the ulna notch of radius?

Answer 3

Distally

Question 4

What else does it articulate with distally?

Answer 4

Articular disc (which separates it from carpals)

Question 5

What does the distal articulations of the ulna provide?

Answer 5

Greater rotation of hand and radius around the ulna

Question 6

What is the main non-metric trait?

Answer 6

Shape of the trochlear notch

Question 7

What else does the ulna articulate with?

Answer 7

Humerus at thr olecranon

radius at radial notch and head

Question 8

What side is the olecranon process found?

Answer 8

Posterior

Question 9

What is on the internal surface of the olecranon process?

Answer 9

Trochlear notch

Question 10

What two landmarks near the proximal end of the ulna have smooth articular surfaces?

Answer 10

Coronoid process

Radial notch

Question 11

What crest comes off of the radial notch?

Answer 11

Supinator crest

Question 12

What lines make the ulna a triangular cross section?

Answer 12

Posterior oblique line

Question 13

What landmark/bony features sits below the coronoid process?

Answer 13

Tuberosity

Question 14

What side is the interosseous crest found?

Answer 14

Lateral

Question 15

Where is the head of the ulna?

Answer 15

Distal end

Question 16

What bony feature is found at the bottom of the head?

Answer 16

Styloid process

Question 17

What is the origin and insertion of triceps brachii?

Answer 17

Origin: radial sulcus of humerus and ifnrglenoid tubercle of scapula
Inserts: olecranon process

Question 18

What movements does triceps brachii produce?

Answer 18

forearm extension and addcution

Question 19

What is the origin and insertion of brachialis?

Answer 19

Origin:m inferior anterior diaphysis of humerus
Inserts: coronoid process and tuberosity of ulna

Question 20

What movements does brachialis produce?

Answer 20

forearm flexion

Question 21

What is the origin and insertion of pronator teres?

Answer 21

Origin: medial border of coronoid process of ulna (also medial epicondyle of humerus)
Inserts: lateral diaphysis of radius

Question 22

What movements does pronator teres produce?

Answer 22

Forearm pronation and flexion

Question 23

What is the origin and insertion of supinator?

Answer 23

Origin: supinator crest (also lateral epicondule of humerus)
Inserts: lateral proximal diaphysis of radius

Question 24

What movements does supinator produce?

Answer 24

Forearm supination

Question 25

What is the origin and insertion of pronator quadratus?

Answer 25

Origin: line on distal anterior and medial diaphysis of ulna
Inserts: distal anterior diaphysis of radius

Question 26

What movements does pronator quadratus produce?

Answer 26

forearm and hand pronation

Question 27

What is the origin and insertion of extensor carpi ulnaris?

Answer 27

Origin: notch on posterior distal end of ulna (lateral to styloid process and also from lateral epicondyle of humerus)
Inserts: 5th metacarpal

Question 28

What movements does extensor carpi ulnaris produce?

Answer 28

hand extension