Anatomy- Upper Extremity

Question 1

Supraspinatus

Answer 1

Initiates abduction of the arm (0-30 degrees)

Suprascapular nerve

Question 2

Infraspinatus

Answer 2

Lateral rotation of the arm

Suprascapular nerve

Question 3

Subscapularis

Answer 3

Medial rotation of the arm

Superior and inferior subscapular nerve

Question 4

Teres minor

Answer 4

Lateral rotation of the arm

Axillary nerve

Question 5

Teres major

Answer 5

Medial rotation & extension of the arm

Inferior subscapular nerve

Question 6

Bicep reflex

Answer 6

C5, C6

Question 7

Tricep reflex

Answer 7

C7, C8

Question 8

Anterior forearm muscles innervated by ulnar nerve

Answer 8

Flexor carpi ulnaris

medial 1/2 of flexor digitorum profundus

Question 9

Flexor digitorum superficialis

Answer 9

Flexes digits 2-5 at PIP

Question 10

Flexor pollicis longus/flexor digitorum profundus

Answer 10

Flex digits at DIP

Question 11

Superficial muscles of the posterior forearm

Answer 11

Brachioradialis
Extensor carpi radialis longis
Extensor carpi radialis brevis
Extensor carpi ulnaris
extensor digitorum
Extensor digiti minimi

Question 12

Deep muscles of the posterior forearm

Answer 12

Supinator
Abductor pollicis longus
Extensor pollicis brevis
Extensor policis longus 
Extensor indicis

Question 13

Muscles of the hand

Answer 13

Thenar eminence, hypothenar eminence, adductor pollicis, palmar interossei, dorsal interossei

Question 14

Erb’s palsy (waiter’s tip)

Answer 14

C5-C6, sometimes C7 as well

Birth difficulty in child pulled toward the side.

Arm is adducted, medially rotated, forearm extended with fingers somewhat flexed

Question 15

Klumpke’s palsy (claw hand)

Answer 15

C8-T1

Loss of innervation to all lumbricals, flexor pollicis brevis

Can be caused by falling out of tree and grabbing branch or being pulled by arms out of womb

Question 16

Distal median nerve lesion (i.e., carpal tunnel)

Answer 16

Presents at rest with claw hand

Question 17

Proximal Median nerve lesion (i.e., at cubital fossa)

Answer 17

Will cause hand of benediction when patient is asked to make a fist

Question 18

Distal ulnar nerve lesion

Answer 18

Essentially a resting Hand of Benediction

Question 19

Proximal ulnar nerve lesion

Answer 19

Resting hand of benediction, but pinkie finger straighter

Question 20

Ulnar artery

Answer 20

Supplies anteromedial aspect of forearm

Question 21

Radial artery

Answer 21

Supplies posterolateral aspect of forearm

Question 22

Lateral (humeral) nodes

Answer 22

Receive most of the lymphatic drainage from the upper limb

Question 23

Anterior (pectoral) nodes

Answer 23

Receive drainage from major part of breast

Question 24

Posterior (subscapular) nodes

Answer 24

Receive drainage from axillary tail of breast

Question 25

Bones of the hand

Answer 25

Scaphoid
Lunate
Triquetrum
Pisiform
Trapezium
Trapezoid
Capitate
Hamate