Anatomy : Upper Limb

Question 1

Muscles in the anterior compartment of the arm

Answer 1

Brachialis
Biceps brachii
Corachobrachialis

Question 2

Flexors innervated by the ulnar nerve

Answer 2

Flexor carpi ulnaris

Flexor digitorum profundus

Question 3

Muscles that hold the humeral head in the glenoid cavity and reinforces the joint capsule

Answer 3

Supraspinatus
Infraspinatus
Teres minor
Subscapularis

Question 4

What causes a flattened deltoid and difficulty abducting the arm?

Answer 4

Axillary nerve injury

Question 5

Most commonly injured carpal bone

Answer 5

Scaphoid

Question 6

Boundaries of the anatomical snuffbox

Answer 6

Extensor pollicis longus
Extensor pollicis brevis
Abductor pollicis longus

Scaphoid and trapezium

(Extend - thumb)

Question 7

Where do you feel the pulse?

radial artery

Answer 7

Between tendons of

• Flexor carpi radialis
• Brachioradialis

(Flexor part…wrist are)

Question 8

What artery is in the anatomical snuffbox?

Answer 8

Radial artery

Question 9

Structures in the carpal tunnel

Answer 9

Median N.

Flexor tendons of digitorum superficialis, profundus and pollicis longus

Question 10

A G3P2 is has pain on flexing the thumb and the wrist

Answer 10

Carpal Tunnel Injury

Question 11

All the intrinsic muscles of the hand are innervated by the ulnar nerve except the

Answer 11

Abductor pol brevis, flexor pol brevis, opponens pollicis and 1st&2nd lumbricals

Question 12

The following are innervated by the median nerve except :
A. Abductor pollicis brevis
B. Adductor pollicis brevis
C. Flexor pollicis brevis
D. Opponens pollicis

Answer 12

Adductor pollicis
(Remember all intrinsic muscles of the hand are innervated by the ulnar nerve except for the thenar muscles and the 1st and 2nd lumbricals)

Question 13

Patient underwent MRM presenting with winging of the scapula. Which nerve is most likely injured?

Answer 13

Long thoracic nerve (the only branch originating from the roots)

Question 14

Wrist drop and saturday night palsy is caused by an injury of the…

Answer 14

Radial nerve at the level of the posterior cord

Question 15

Waiter’s tip injury as caused by an upper brachial plexus injury has these three components

Answer 15

Adducted, extended, and medially rotated forearm + pronated forearm + carpal flexors flex hand at wrist

Question 16

Newborn complicated birth with shoulder dystocia is mostlikely to have an injury in the

Answer 16

Injury to the superior trunk (C5-C6)

Part of Erb-Duchenne’s Syndrome

Question 17

Medial rotator muscle of the shoulder joint

Answer 17

Subscapularis

Question 18

Among the muscles of the rotator cuff, which would abduct the shoulder and would be injured by a direct blow to the front of the joint?

Answer 18

Supraspinatus; tendon of supraspinatus

Question 19

Inability to supinate forearm could result from injury to which pair of nerves

Answer 19

Musculocutaneous and radial nerves

Question 20

Main flexor of the forearm

Answer 20

Brachialis

Question 21

Inflammation of the common EXTENSOR tendon is called _____. Where is the common origin of the tendons of the muscles involved?

Answer 21

Tennis elbow

Lateral epicondyle of the humerus

Question 22

Inflammation of the common FLEXOR tendon is called _____. Where is the common origin of the tendons of the muscles involved?

Answer 22

Golfer ‘s elbow

Medial epicondyle of the humerus

Question 23

Thenar muscles

Answer 23

Abductor pollicis brevis
Flexor pollicis brevis
Opponens pollicis

Question 24

Hypothenar muscles

Answer 24

Abductor digiti minimi
Flexor digiti minimi
Opponens digiti minimi

Question 25

Compression of C8-T11(inferior trunk) would cuse

Answer 25

Weakness of the intrinsic muscles of the hand

APE Hand + Claw hand

Question 26

A child has sustained a supracondylar fracture of the humerus and now has the index and middle finger in sustained extension when trying to make a fist. What is the affected nerve?

Answer 26

Median nerve (hand of benediction)

Question 27

What nerve runs through the midshaft of the humerus p? And how would injury to the nerve present as?

Answer 27

Radial nerve

Wrist drop

Question 28

Most commonly dislocated carpal bone

Answer 28

Lunate

Question 29

Only supinator in the anterior compartment of the arm?

Answer 29

Biceps Brachii