Ankle Flashcards
the higher the value, the better the chance to rule in the condition or pathology
Specificity
navicular drop test
- To quantify the amount of foot pronation
- Intended to represent the sagittal plane displacement of the navicular tuberosity from a neutral position to a relaxed position in standing.
- Assess change in height of the navicular from a subtalar neutral position to relaxed standing (6-8 mm normal; > 10-15 excessive)
IF THERE IS NOT SUFFICIENT EVERSION IN A VARUS
DEFORMITY THEN THE FOOT CANNOT COMPENSATE USING EVERSION AND WILL REMAIN IN A VARUS POSITION WHEN IN WEIGHTBEARING. IN THIS CASE THE MEDIAL BORDER OF THE FOOT WILL NOT TOUCH THE FLOOR, OR TOUCH IT VERY LIGHTLY. This foot will be _________ in WB.
supinated
what muscle keeps the 1st ray on the ground during gate?
fibularis longus
(eversion and plantar flexion)
which joint of the foot has the biggest component in pronation and supination?
both subtalar joint and midtarsal joint
Uncompensated rearfoot varus in non weight bearing
No or extremely limited STJ eversion
How to find subtalar joint neutral
- Pt in prone
- Palpate medial and lateral talus
- Apply a force in DF to 4th and 5th metatarsals and IN and EV
- When talus feels equally in both fingers
- Mesure with gonio
Varus or vertical, valgus is rare.
During pronation the axes of the STJ/MTJ are parallel giving more mobility
Subtalar joint ROM measurement technique
- More IN (avg = 38.7°)
- than EV (avg = 9.9°)
presence of subtalar joint eversion during NWB,
in WB: low arch, calcaneus everts to vertical or more, medial talar bulge, lateral fatpads bulge
compensated rearfoot varus
Orthotic goal with uncompensated rearfoot varus
bring the ground to the foot
- medial rearfoot varus POST
- will prevent the need for compensations from initial contact to early
IF THERE IS SUFFICIENT EVERSION IN A VARUS
DEFORMITY THEN THE FOOT WILL COMPENSATE BY EVERTING A GREAT DEAL UNTIL THE MEDIAL BORDER OF THE CALCANEUS IS ON THE FLOOR. This foot will be _________ in WB.
hyper-pronated
Forefoot varus, inverted forefoot
Manter originally described two axes of rotation for movement at the transverse tarsal joint:
longitudinal and oblique
subtalar joint rearfoot varus vs valgus
orthotic goal of a compensated rearfoot varus
- controll but not eliminate STJ eversion from initial contact to MST
- Medial rearfoot varus post (corrective post, not supportive)
- Arch support