Mechanisms and Characteristics of MSK Injuries - CH. 9

Question 1

what are the different ways in which tissue can be loaded?

Answer 1

compression
shear
tension
torsion 
bending

Question 2

for tendon injuries, what is the breaking point of collagen fibers?

Answer 2

6-8% increase in length

Question 3

difference between tendinitis vs tendinosis vs. tenosynovitis

Answer 3

tendinitis - inflammation of the tendon (due to decreased glide between structures

if tendinitis doesn’t heal properly

tenosynovitis - synovial sheath is inflammed and reduces free gliding of the tendon

Question 4

difference between latent trigger point and active trigger point

Answer 4

latent TP: no P just chilling out

active TP: P while at rest

Question 5

def’n stiffness

Answer 5

the capacity of tissue to withstand external force

the resistance of the external force causes internal strain

Question 6

def’n of creep

Answer 6

amount of deformation of tissue due to constant load over time (past the yield point)

Question 7

at what point can tissue revert back to its original length?

Answer 7

up until the yield point - goes into permanent plastic changes after yield point

Question 8

when a tissue is “ductile” what does this mean? opposite of ductile?

Answer 8

it can deform for a while before it breaks (like pulling apart chewed bubble gum)

brittle

Question 9

why is it a concern with injuries to the epiphyseal growth plate?

Answer 9

can prematurely stunt growth

Question 10

a rugby athlete comes off the pitch and runs to you holding his eye - you assess his face and find crepitus, obvs deformity - what kind of fracture is this?

Answer 10

blow out fracture - fracture of the orbit of eye

Question 11

what kind of fracture would likely damage internal organs?

Answer 11

serrated fractures - due to jagged edges

Question 12

what fractures would likely occur on flat bones (scapula)?

Answer 12

depressed fractures

Question 13

what are the 5 types of injuries to the epiphyseal growth plate?

Answer 13

1. complete separation of physis
2. separation of physis and metaphysis (small chuck)
3. seperation and fx part of physis
4. fx at both physis and metaphysis
5. crushing of physis (no displacement - stunts growth)

Question 14

where is sever’s disease located?

Answer 14

calcaneus

Question 15

def’n of neuropraxia

Answer 15

disturbance of conduction in order to communicate through the nn fibre

• involved motor fx more so than sensory