Wk7- FPI Flashcards
What are the 6 FPI criterias
- Talar head palpation
2.malleolar curves - Calcaneal frontal plane position
- Tall-navicular bulge
- Congruence of MLA
- Forefoot abduction/adduction
Pronated foot type =
Supinated =
Pronated = positive result
Sup= negative result
Interpretation of FPI scores
Normal= 0- 5
Pronated = 6 to 9 Highly pronated = 10+
Supinated= -1 to -4 highly supinated = -5 to -12
STJ motion - OKC/CKC
Talus doesn’t move in open
Calc and talus move in closed - weightbearing
Purpose of OKC measures (non weight bearing)
- assess total ROM of joint
-assess direction of motion of joint - assess positional deformity of a joint
Define Rearfoot varus
Inverted position of the cal in relation to the ground in NCSP
Cause of rearfoot varus
congential osseous deformity due to
- tibial varum and or
-STJ varum
Pathomechanics of rearfoot varum During gait
Loading response- rapid and excessive pronation required at STJ + excessive internal tibial rotation until end of ROM or until FF contacts ground. This means further unlocking of MTJ occurs
What does a fully compensated RFVR look like in RCSP
Sufficient STJ pronation available
Heel will appear vertical and STJ pronated
What does a partially compensated RFVR look like in RCSP
Available STJ pronation (eversion) less than the degree of RFVR
-RCSP will be inverted but less than NCSP
What does an uncompensated RFVR look like in RCSP
- no available STJ eversion, heel stays in inverted position during gait
-RCSP = NCSP position
Signs and symptoms of a compensated FRVR
-callous PMA 2-4
-low arch
-lateral shoe wear
-Hallux limitus with bunion
-muscle fatigue
-inversion ankle sprains
-heel pain
Signs and symptoms of partially/uncompensated RFVR
-callous on lateral foot
-tailors bunion
-acquired plantarflexed 1st ray
-inversion ankle sprains
-lack of internal tibial rotation/shock attenuation mechanisms
Define rearfoot valgus
Everted position of calc in relation to the ground in NCSP (not to be confused with a pronated RCSP)
What is the cause of RFVL
Congential osseous deformity:
May be present in cases of:
-tibial valgum (rare)
What does compensation for RFVL look like
-if RFVL more than a few degrees then head of talus will hit ground before STJ reaches full ROM
-less symptoms
What is the difference between STJ VR/VL deformity and RF VR/VL deformity?
STJ- OKC which can be negated by a tibial varum/valgus which results in no rearfoot deformity
RF- CKC deformity with respect to the ground
How is the MTJ believed to lock during supination?
-cuboid and dorsal border of calc lock
-ligaments
Does the MTJ move when the STJ moves?
Yes. Due to articular surfaces
Define Forefoot varus
When the STJ is neutral, MTJ pronated, forefoot locked and
-the forefoot is inverted in respect to the rearfoot
Pathomechanics of FFVR during gait
Excessive STJ pronation through midstance ( if only a few degrees)
“ through midstance, terminal, toe off, swing if more than a few degrees
What does a compensated FFVR look like
More STJ eversion available than the size the FFVR, therefore can pronate to make contact
Partially compensated FFVR looks like
STJ pronated to end ROM is less than size of FFVR
-additional pronation can occur through MTJ and plantar flexion of 1st ray
Uncompensated FFVR looks like
STJ at end ROM and FF is not at the ground
Which could rule in a
-Tib VR and Or
-RFVR
Present as well
