Cubital Fossa and Forearm

Question 1

What ligament holds the head of the radius in place?

Answer 1

Annular ligament

Question 2

What is ‘pulled elbow’?

Answer 2

Dislocation of elbow joint by sudden pull on extended, pronated forearm

Question 3

What are the three ligaments of the elbow?

Answer 3

Radial collateral
Ulnar collateral
Annular

Question 4

List the contents of the cubital fossa.

Answer 4

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Radial 
Nerve
Biceps
Tendon
Brachial 
Artery
Median 
Nerve

Question 5

What happens to the brachial artery at the cubital fossa?

Answer 5

Bifurcates into radial and ulnar arteries

Question 6

Name the superficial flexor muscles

Answer 6

Pronator teres
Flexor Carpi radialis
Flexor carpi ulnaris
Palmaris longus

Question 7

Name the intermediate flexor muscle

Answer 7

Flexor digitorum superficialis

Question 8

Name the deep flexor muscles

Answer 8

Flexor digitorum profundus
Flexor pollicis longus
Pronator quadratus

Question 9

What is the common origin of the flexors?

Answer 9

Medial epicondyle of humerus

Question 10

Other than flexion, what actions do FCR and FCU produce?

Answer 10

FCR = Abduction of wrist
FCU = Adduction of wrist

Question 11

What is the innervation of the superficial wrist flexors?

Answer 11

FCU = ulnar nerve

everything else = Median nerve

Question 12

What is the action of brachioradialis?

Answer 12

Flexion

Returns forearm to mid-prone position from full supination or pronation

Question 13

What is the nerve supply of brachioradialis?

Answer 13

Radial nerve

Question 14

Why is brachioradialis unusual?

Answer 14

Flexor but on posterior surface, originates from common extensor origin

Question 15

Onto which phalanges does flexor digitorum superficialis insert?

Answer 15

Intermediate phalanges of digits II-V

Question 16

Where does the median nerve lie in relation to flexor digitorum superficialis?

Answer 16

Between the 2 heads

Question 17

Where do the tendons of flexor digitorum profundus insert?

Answer 17

Distal phalanges, digits II-V

Question 18

Name the superficial extensors of the forearm

Answer 18

Extensor Carpi Radialis Longus
Extensor Carpi Radialis Brevis
Extensor Carpi Ulnaris
Extensor digitorum
Extensor Digiti Minimi

Question 19

Where is the common extensor origin?

Answer 19

Lateral epicondyle of the humerus

Question 20

What is the innervation of the superficial extensor muscles?

Answer 20

Radial nerve

Question 21

What is the function of anconeus?

Answer 21

Abduction of ulna in pronation

Accessory elbow extensor

Question 22

Name the deep extensor muscles

Answer 22

Extensor Indicis
Extensor Pollicis Brevis
Extensor Pollicis Longus
Abductor Pollicis Longus

Question 23

What bony elements can be palpated in the floor of the anatomical snuffbox?

Answer 23

Scaphoid

Trapezium

Question 24

Which artery can be palpated in the snuffbox?

Answer 24

Radial artery

Question 25

Which vein can be accessed in the snuffbox?

Answer 25

Cephalic vein

Question 26

Which muscles are responsible for pronation of the forearm?

Answer 26

Pronator teres

Pronator quadratus

Question 27

Which muscles are responsible for supination of the forearm?

Answer 27

Biceps brachii

Supinator