MSK 2

Question 1

Distal radius and stylus processes of the ulna
Bone fragments are displaced dorsally distal to the fracture
Dinner fork deformity

Answer 1

Colles fracture

Question 2

Mechanism of shoulder anterior dislocation

Answer 2

abduction, extension, and external rotation

Volleyball spike

Question 3

Excessive valgus deformtiy

Answer 3

MCL, medial meniscus (which is firmly attached)

Question 4

Excessive varus deformity

Answer 4

injures LCL but not the meniscus b/c it is not firmly attached

Question 5

3 tears in the unhappy triad

Answer 5

Tibial ligament, medial menisus, ACL
lateral blow to a flexed knee
Anterior drawer test, valgus deviation

Question 6

extreme inversion of the foot

Answer 6

sprain of lateral ligament

anterotalofibrilar ligament

Question 7

extreme eversion of the foot

Answer 7

medial ligament (deltoid) 
Pottt fracture of the fibula & medial malleolus

Question 8

anterior arm

Answer 8

flexors

Musculocutaneous N

Question 9

posterior arm

Answer 9

extensors

radial N

Question 10

anterior forearm

Answer 10

pronators and flexors 
median never (except the flexor carpi ulnaris - medial digitorum profundus (ulnar nerve)

Question 11

posterior forearm

Answer 11

extensors, supinators - radial nerve

Question 12

Fracture of surgical neck of the humerous & ahoulder dislocation –> axillary nerve damage - deficits?

Answer 12

impaired abduction (deltoid) & external rotation (teres minor)

Question 13

Midhumerous fracture/ radial head dislocation –> radial nerve damage

Answer 13

wrist drop due to loss of extensors

Question 14

Fracture of lateral epidondyle - nerve damage?

Answer 14

median nerve

Hand of Benediction

Question 15

medial epicondyle fracture of the humerous

Answer 15

ulnar nerve

claw hand

Question 16

Anterior thigh

Answer 16

hip flexors, knee extensors

Question 17

Damage to this nerve (LOF in anterior and lateral compartments
Anterior – dorsiflex and extend toes
Lateral – eversion
Pt will develop a high step gait

Answer 17

common fibular

Question 18

prevents contraction - occuplies the myosin binding site on actin

Answer 18

Tropomyosin

Question 19

calcium binds to this protein and induces a conformational change that moves tropomyosin

Answer 19

troponin

Question 20

functional component of contraction

Answer 20

myofibril