Cubital Fossa and Anterior Forearm

Question 1

Deep Fascia

Answer 1

Antebrachial fascia
Interosseous membrane between bones

Question 2

Cutaneous innervation of the axilla and arm

Answer 2

Cutaneous branch of radial n.
Medial cutaneous n. of arm
Medial cutaneous n. of forearm
Lateral cutaneous n. of forearm
Dorsal cutaneous branch of ulnar n.
Superficial branch of radial n.

Question 3

Carpal bones

Answer 3

Trapezium
Scaphoid
Lunate
Triquetrum
Pisiform
Hamate
Capitate
Trapezoid

Question 4

Cubital Fossa contents

Answer 4

Tendon of biceps brachii muscle
Brachial artery
Median N.

Question 5

Cubital fossa boundaries

Answer 5

Superior: medial and lateral epicondyles
Medial: pronator teres m.
Lateral: brachioradialis
Floor: brachialis and supinator
Roof: brachial and antebrachial fascia and bicipital aponeurosis

Question 6

Pronator Teres Muscle

Answer 6

O: medial epicondyle of humerus and coronoid process of ulna
I: middle of lateral surface of radius
Inn: medial n.
Actions: pronates and flexes forearm

Question 7

Flexor Carpi Radialis muscle

Answer 7

O: Medial epicondyle of humerus
I: base of 2nd metacarpal
Inn: median n.
Actions: flexes and ABducts the hand (towards the radius)

Question 8

Palmaris Longus muscle

Answer 8

O: medial epicondyle of humerus
I: distal half of flexor retinaculum and palmar aponeurosis
Inn: median n.
Actions: flexes hand and tenses palmar aponeurosis

Question 9

Flexor Carpi Ulnaris Muscle

Answer 9

O: medial epicondyle of humerus
I: pisiform, hook of hamate, and 5th metacarpal
Inn: ulnar n.
Actions: flexes and ADducts the hand (moves it towards the ulnar)

Question 10

Flexor digitorum superficialis muscle

Answer 10

O: medial epicondyle of humerus
I: middle phalanges of digits 2-5
Inn: median n.
Actions: flexes digits 2-5 and weakly flexes the hand

Question 11

Medial epicondylitis

Answer 11

Golfer’s elbow or baseball elbow
History of repetitive stress, pain with restricted pronation or flexion of wrist
Ulnar n.

Question 12

Flexor digitrorum profundus muscle

Answer 12

O: proximal 3/4 of medial and anterior surfaces of ulna and interosseous membrane
I: Base of distal phalanges of digits 2-5
Inn: Anterior interosseous n. from median n. and ulnar n.
Actions: flexes digits 2-5 and flexes the wrist

Question 13

Flexor pollicis longus muscle

Answer 13

O: anterior surface of radius and adjacent interosseous membrane
I: Base of distal phalanx of pollex
Inn: anterior interosseous n. from median n.
Actions: flexes pollex and weak flexion of the wrist

Question 14

Pronantor quadratus muscle

Answer 14

O: distal 1/4 anterior surface of ulna
I: distal 1/4 anterior surface of radius
Inn: anterior interosseous n. from median n.
Actions: pronates forearm, deep fibers bind radius and ulna

Question 15

Arteries of the forearm

Answer 15

Radial a. passes along lateral aspect of forearm
Ulnar a. passes along medial aspect of forearm

Question 16

Radial artery branch

Answer 16

Radial recurrent artery

Question 17

Ulnar artery branches

Answer 17

Anterior ulnar recurrent a.
Posterior ulnar recurrent a.
Common interosseous a. gives rise to anterior interosseous and posterior interosseous artery

Question 18

Nerves of the anterior forearm

Answer 18

Median n. - anterior interosseous n. and palmar branch
Ulnar n. - dorsal and palmar branch
Radial n. - superficial and deep branch

Question 19

Myotome and Tendon testing

Answer 19

C6 - elbow flexion
C7 - Elbow extension
C8 - ulnar deviation

Question 20

Carpal tunnel

Answer 20

Median nerve is compressed. The transverse carpal ligaments compresses the medial nerve through the carpal tunnel
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