Biomechanics

Question 1

How to you determine a Structural limb Length deformity?

Answer 1

ASIS to medial malleolus: 1 cm difference

Question 2

How to you determine a functional limb Length deformity?

Answer 2

Umbilicus to medial malleolus

Question 3

CT scout film for LLD?

Answer 3

Scanogram

Question 4

What is LaSegue’s Sign?

Answer 4

Test for sciatica –> Knee extension with hip flexed elicit pain and parathesia down the leg

Question 5

What condition commonly affects the 4th metatarsal?

Answer 5

Brachymetatarsia

Question 6

Which type of deforming force most commoly results in a hammer toe?

Answer 6

Flexor stabilization –> flexor substitution is least common

Question 7

IS the plaster or orthotic modified for kirby skive?

Answer 7

Plaster –> once casted patient will have more supinatory force

Question 8

What type of braces is most commonly prescribed by podiatrists for PTTD?

Answer 8

Supramalleolar orthosis: Ritchie and arizona brace

Question 9

What is the difference between concentric and eccentric contraction?

Answer 9

Concentric –> shortens with contraction

Eccentric–> lengthens with tension

Question 10

When walking how long is stance phase? running?

Answer 10

Stance walking –> 60%

Stance running –> 40%