MSK qs

Question 1

Patient with fractured humerus loses sensation on their post. lateral 3 digits, have nerve have they damaged, what are the spinal roots and where does it lie in relation to axillary artery?

Answer 1

Radial nerve (C5-T1)
Runs posterior to axillary artery

Question 2

Differences between shoulder and hip joint

Answer 2

a) both synovial
b) both ball and socket
c) both allow 6 movements

i) spiral ligaments in hip increase stability
ii) deeper socket in hip with labrum more stability
iii) increased movement in shoulder

Question 3

Name main action, nerve supply and action of the six compartments of the lower limb

Answer 3

1. ant. thigh - extensor at knee / femoral / femoral artery
2. med. thigh - adduction / obturator nerve / femoral artery
3. post. thigh - flexor at knee / sciatic nerve / femoral artey
4. ant. leg - dorsiflexion & inversion at ankle & extension of toes / deep peroneal nerve / ant. tibial artery
5. lat. leg - eversion / superficial peroneal nerve / peroneal artery
6. post. leg - plantarflexion & inversion at ankle & flexion at toes / tibial nerve / post. tibial artery

Question 4

Describe interossei muscles

Answer 4

4 - dorsal abduction
3 - palmar adduction
PAD
DAB

Question 5

Explain strain model

Answer 5

Site specific customary strain stimuli
(increased = bone formation
decreased = bone loss)

Question 6

Decribe tendon hierachy

Answer 6

tropocollagen, monofibril, subfibril, fibril, fascicle, tendon

Question 7

What is valgus/varus?

Answer 7

R U out?
varus = bows outwards
Valgus = bows inward