UL Anatomy

Question 1

Fracture clavicle, which structure most liable for bleeding, subclavian artery or vein?

Answer 1

Vein
Artery is protected by subclavian muscle, unless bleeding is profuse

Question 2

Rotator cuff muscles and their attachments

Answer 2

SITS
Supraspinatus
Infraspinatus
Teres minor
Attach to Greater Tubercle

Subscapularis
Attach to Lesser Tubercle

Question 3

Flexor forearm muscles are supplied by which nerve?

Answer 3

All by the median except flexor carpi ulnaris and medial part of flexor digitorum profundus

Question 4

Extensor forearm muscles supplied by:

Answer 4

Radial nerve

Question 5

Which structures are affected by DeQueravain tenosynoitis?

Answer 5

Abductor pollicis longus
Extensor pollicis brevis
Both are components of Compartment I

Question 5

Anterolateral boundary of snuffbox

Answer 5

Abductor pollicis longus and extensor pollicis brevis

Question 6

Relationship between extensor digitorum and extensor indices

Answer 6

Indices medial to digitorum

Question 7

Nerve to adductor pollicis

Answer 7

Deep ulnar nerve

Question 8

Innervation to thenar muscles:

Answer 8

Median nerve

Question 9

Innervation to intrinsic muscles of the hand:

Answer 9

Ulnar nerve except lateral 2 lumbricals (median nerve) and thenar muscles

Question 10

Which part of the brachial plexus is most commonly injured in clavicle fracture:

Answer 10

Lower trunk

Question 11

Which part of the brachial plexus is most commonly injured in patients with crutches:

Answer 11

Cords

Question 12

Median nerve injury patterns at wrist, elbow, AIN

Answer 12

Wrist: thenar eminence wasting and paralysis, ape hand deformity
Elbow: as above + loss of pronation and flexion of wrist
AIN: loss of pincer

Question 13

Muscles supplied by ulnar nerve

Answer 13

MAFIA P
Medial 2 lumbricals
Adductor pollicis
Flexor digirotum profundus (medial side)/flexor carpi ulnaris/
Interossei
Abductor and Opponens and flexor digiti minimi(hypothenar eminence
Palmaris brevis

Question 14

Pattern of injury ulnar nerve:

Answer 14

Wrist: wasting and paralysis of intrinsic muscles (partial claw hand), and hypothenar eminence
Loss of sensation medial 1 1/2 fingers
Elbow: Radial deviation, Less pronounced Clawing but less in 4th and 5th digit

Question 15

Muscles supplied by radial nerve

Answer 15

BEAST
Brachioradialis
Extensors
Anconeus
Supinator
Triceps

Question 16

Elbow drop, wrist and finger drop, nerve affected?

Answer 16

Radial

Question 17

finger drop without sensory loss?

Answer 17

Posterior interosseus nerve

Question 18

Shoulder abduction degrees and muscles involved:

Answer 18

0-15° Supraspinatus
15-90° Deltoid
>90° Trapezius and serratus anterior

Question 19

Cubital fossa components from medial to lateral:

Answer 19

median nerve, brachial vein, artery, biceps tendon

Question 20

Supracondylar fracture, most medial structure that can be damaged:

Answer 20

Ulnar nerve

Question 21

Muscle that separates subclavian artery from vein:

Answer 21

Scalenus anterior

Question 22

Palm facing up, thumb to ceiling, muscle and nerve:

Answer 22

abductor pollicis brevis, median nerve

Question 23

Froment’s sign, patient weakness on grasping sheet of paper between thumb and side of index:

Answer 23

Deep ulnar nerve, adductor pollicis