POSTERIOR TIBIALIS M

Question 1

what period of the stance phase is the posterior tibialis m active?

Answer 1

early contact/early propulsion

Question 2

what does the posterior tibialis m function in the early contact/early propulsion phase?

Answer 2

functions early in contact because it can work as soon as 5th met touches the ground

stops in propulsive once heel lifts off the ground

Question 3

1)what are the pulleys that affect the PT? 2)which allows it to have what functions

Answer 3

1)medial malleolus acts as pulley for effect at STJ and ankle

navicular tuberosity acts as pulley for an effect on MTJ

2)ankle plantarflexor

STJ supinator (most important STJ supinator)

OMTJ supinator

Question 4

what is the important function of the posterior tibialis m?

Answer 4

serves to decelerate STJ pronation and interval leg rotation during contact with help from soleus

accelerates STJ supination and external leg rotation during midstance assisted by soleus and long digital flexor

Question 5

what is the pathology of the posterior tibialis m?

Answer 5

severe flat foot out to slippage of PT tendon or trauma