Week 8 - Late stance phase pathomechanics

Question 1

What is occurring up the chain during midstance

Answer 1

Beginning of single leg support. Hip externally rotating adn extending, knee flexed but extending, ankle dorsiflexed passively as stance leg moves over the foot. STj pronated until the end of midstance, when it begins resupinating. Calcaneocuboid joint locking to provide rigid lever for toe off

Question 2

What could cause excessive pronation during midstance?

Answer 2

Forefoot varus, rigid rearfoot varus, RF valgus, PTTD, excessively abducted foot, LLD

Question 3

What can cause excessive supination during midstance?

Answer 3

Rigid plantarflexed first ray, rigid rearfoot varus or forefoot valgus, LLD

Question 4

What are the 3 compensatory actions that can occur with excessive plantar flexion?

Answer 4

Premature heel lift, kne hyperextension, forward trunk lean