Upper limb Skeleton

Question 1

c3 dermatome

Answer 1

trap area

Question 2

c4 dermatome

Answer 2

front delt area

Question 3

c5 dermatome

Answer 3

lat to cubital fossa, upper arm

Question 4

c6 dermatome

Answer 4

lat part of lower arm, thumb and half of index

Question 5

c7 dermatome

Answer 5

half of index + ring finger, middle finger

Question 6

c8 dermatome

Answer 6

half of ring and pinky

Question 7

t1 dermatome

Answer 7

medial to cubital fossa, upper arm

Question 8

t2 dermatome

Answer 8

right above armpit medially

Question 9

t3/4 dermatome

Answer 9

arm pit area

Question 10

cardiac pain projects to what dermatomes

Answer 10

t1,2,3 C8

Question 11

when does the clavical ossify

Answer 11

5-6th w of embryo (first and last bone to completel ossify)

Question 12

at what age is the clavical completely ossified`

Answer 12

25-31

Question 13

what does congenital failure of formation of central part of clavical (pseudo arthritis) present as

Answer 13

produces a painless promenance in middle third of right clavicle
-just secondary ossification center develops

Question 14

where and what is compressed in thoracic outlet syndrome

Answer 14

compression of the

• subclavian artery and vein
• inf trunk of the brachial plexus

under medial half of clavical

Question 15

weakest part of clavical and what happens in a fracture

Answer 15

middle-later third

-medial part is pulled up due to SCM

Question 16

sup and inf angle and spine are at what spinal cord lvl

Answer 16

sup- T2

inf- T7

spine- T3

Question 17

suprascapular notch is bridged by

Answer 17

sup transverse scapular lig

Question 18

spiniglenoid notch is bridged by

Answer 18

inf transverse scapular lig

Question 19

what nerve will a spinoglenoid notch cyst put pressure on

Answer 19

compression on supreascapular nerve (that runs deep to sup transverse lig)

Question 20

what area can you palpate to feel the coracoid process

Answer 20

deltopectoral triangle

Question 21

where is the surgical neck of the humerus located and what is it a common site for

Answer 21

• bw the post greater and ant lesser tubercles

- site of fracture

Question 22

how many facets does the greater tubercle have

Answer 22

sup (supraspinatus)
middle (infraspinatus)
inferior( teres minor)

Question 23

in a fracture of the surgical neck of humerus what vessels would be affected

Answer 23

Post circumflex humeral a + v

Axillary n

Question 24

In a transverse fracture of the humerus what muscles pull what

Answer 24

delt will pull upper frag lat and distal frag is pulled by biceps brachii

Question 25

where is the supinator fossa located

Answer 25

-is on the lateral aspect of prox epiphysis just inf to radial notch of ulna

Question 26

what styloid is lower distally

Answer 26

radius (alothough both are palpable)

Question 27

what makes up the medial and lat carpal eminence

Answer 27

med- hook of hamate + pisiform lat- tub of trapezium + tubercle of scaphoid

Question 28

colles fracture

Answer 28

distal fragments of radius overrides rest of bone

Question 29

Most frequent fractured carpal bone and complications associated w it

Answer 29

-fracture of scaphoid - fall on palm when hand is abducted - often misdiagnosed - poor blood supply so avascular necrosis of prox scaphoid may occur

Question 30

palpable surfaces anteriorly

Answer 30

- sup border of clavical - ac joint - acromion - greater and lesser tubercle - coracoid process - lat + med epicondyle - lat border of distal radius - head of ulna distal - tubercle of trapezium - pisiform - hook of hamate - heads of metacarpals andheads of phalanges

Question 31

palaple surfaces post

Answer 31

- sup border of cavical - acromion - greater tub - spine of scap - med and inf border of scap - med and lat epicondyle - post border of ulna - lat and med part of distal radius and ulna - capitate - post aspects of metacapals and phalanges