Foot muscle forces and deformities?

Question 1

What muscles are weak in pes cavus?

Answer 1

• Weak Tibialis Anterior
• weak peroneus brevis
• Strong Peroneus Longus overpowers tibilalis ant-> dropped 1st ray
• Strong Tibialis posterior overpowers peroneus brevis- hindfoot varus and forefoot adduction, forfoot pronation

Question 2

What muscles are weak /strong in pes planus

Answer 2

• Weak Tibialis posterior
• Strong- Peroneus brevis- everts hindfoot and abducts midfoot
  
  • Toe many toes sign
  • antagonist to Tib post
  • forefeoot supination- strong tibialis anterior

Question 3

What muscles are weak/strong in equinus?

Answer 3

• weak- tibialis anterior
• Strong- Gastrosoleus complex

Question 4

What muscles are strong and weak in equinovarus ?

Answer 4

• Strong- gastrosoleus complex
• strong varus- tib post
• weak peroneus longus and brevis

Question 5

Where do you see equinovarus deformity?

How do you tx this?

Answer 5

• In stroke victims

TX

• USe AFO and physio for at laest 6 months to see if any return of neuro

Non op

• Phenol/ Botox injections

Surgery

• Split anterior tibialis tendon transfer
• FHL transfer to dorsum of foot and release FDL and Brevis at base of each toe
• Lengthen gastronemius/ achilles

Question 6

Describe the Siferskoil