Bones of the forearm

Question 1

Capitulum articulates with the:

Answer 1

Radius

Question 2

Trochlea articulates with the

Answer 2

Ulna

Question 3

Landmarks of the proximal ulna

Answer 3

Articulating surface for the humerus
Articular surface for radius
Olecranon process
Coronoid process
Trochlear notch
Supinator crest

Question 4

Anterior border of ulna landmarks

Answer 4

Superior medial aspect of coronoid process to anterior styloid process

Question 5

Attachments on anterior border of the ulna (2)

Answer 5

Pronator quadratus

Flexor digitorum profundus

Question 6

Landmarks of the posterior border of the ulna

Answer 6

Apex of olecranon process to the posterior aspect of the styloid process

Question 7

Attachments on posterior border of ulna

Answer 7

Flexor digitorum profundus
Flexor carpi ulnaris
Extensor carpi ulnaris

Question 8

Landmarks of interosseus border of ulna

Answer 8

Above union of two lines of radial notch to head of ulna

Question 9

Attachments on interosseus border of ulna

Answer 9

Interosseus membrane

Supinator

Question 10

Features of anterior surface of ulna

Answer 10

Concave upper portion
Broad superior to narrow inferior
FDP attachment proximal
Pronator quadratus (distal)

Question 11

Features of posterior surface of ulna

Answer 11

Oblique ridge on sup portion runs from post radial notch to posterior border
Anconeus
ECU
Supinator
Extensor indictus

Question 12

Features of medial surface of ulna

Answer 12

Broad and concave superiorly
Narrow convex distally
FDP

Question 13

Features of distal end of the ulna (6)

Answer 13

Head (lateral)
Styloid process (medial)
Articulation with triangular fibrocartilaginous complex (TFCC)
Lateral head articulates with ulnar notch of radius
Groove between head and styloid (attachment of tfcc)
Groove on posterior aspect of styloid for tendon of ECU

Question 14

Features pf proximal end of radius (4)

Answer 14

Head
Superior aspect has a concavity for articulation with capitulum
Annular ligament
Articulation w radial notch of ulna

Question 15

Feature of neck of the radius

Answer 15

Ridge for attachment of supinator

Question 16

Landmarks for the radial tuberosity

Answer 16

Distal and medial to neck

Question 17

Features of radial tuberosity

Answer 17

Attachment of biceps brachii

Smooth portion for bursa

Question 18

Anterior border of radius landmarking

Answer 18

Radial tuberosity to anterior styloid process

Question 19

Features of anterior border of radius

Answer 19

Oblique line
Supinator (sup to oblique line)
Pronator quadratus (distal border)

Question 20

Landmarking posterior border of radius

Answer 20

Posterior aspect of head to Lister’s tubercle (posterior tubercle)

Question 21

Landmarking interosseus border

Answer 21

Posterior aspect of radial tuberosity to ulnar notch of radius

Question 22

Feature of interosseus border of radius

Answer 22

Attachment of interosseus membrane

Question 23

Features of anterior surface of radius

Answer 23

Flexor pollicis longus (superior)
Pronator quadratus (inf)

Lies between anterior and interosseus borders

Question 24

Features of posterior surface of radius

Answer 24

Listers (dorsal) tubercle acts as a pulley for EPL
Supinator covers surface
Abductor pollicis longus
EPB

Between posterior and interosseus border

Question 25

Features of lateral surface of radius

Answer 25

Majority of styloid process
Abductor pollicis longus
Extensor pollicis brevis
Supinator insertion

Between anterior and posterior border

Question 26

Features of distal end of radius

Answer 26

Ulnar notch (medial)
Articular disc
Facets for lunate (medial) and scaphoid (lateral)
Concave
Styloid process of radius
Ridge between facets
Lateral collateral ligament attachment