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26 Cards in this Set

  • Front
  • Back
Hindfoot Components
talus
calcaneus
subtalar joint
Midfoot Components
cuneiforms
navicular
cuboid
midtarsal joint
Forefoot Components
metatarsals
phalanges
MTP joints
IP joints
Subtalar Joint
-plane jt
-articulation between the talus and calcaneus
-allows mainly foot inversion and eversion
Midtarsal Joint
-calcaneocuboid + talonavicular joints
Talonavicular Joint
-ball and socket
-allows DF, PF, ER and IR
-stabilizers:
dorsal talonavicular
tibionavicular
plantar calcaneonavicular
Calcaneocuboid Joint
-plane jt
-allows inversion/eversion
-stabilizers:
dorsal calcaneocuboid
bifurcate calcaneocuboid
short plantar
long plantar
TMT Joints
-plane jts
-allow FL and EXT
-stabilizers:
dorsal TMT lig
plantar TMT lig
interosseous TMT lig
MTP Joints
-condyloid jts
-allow FL and EXT, slight ABD,ADD,circumduction
-stabilizers:
LCL,MCL,plantar lig, deep transverse MT lig
IP Joints
-hinge jts
-allow FL and EXT
-LCL, MCL, plantar ligs
OKC Subtalar Pronation
-calcaneal eversion
-calcaneal ER
-calcaneal DF
OKC Subtalar Supination
-calcaneal inversion
-calcaneal IR
-calcaneal PF
CKC Subtalar Pronation
->heel strike to midstance
-calcaneal eversion
-talar med. rotation
-talar PF
-tib/fib med. rotation
CKC Subtalar Supination
->midstance to toe off
-calcaneal inversion
-talar lat. rotation
-talar DF
-tib/fib lat. rotation
Structures limiting Subtalar inversion
-calcaneofibular lig
-lat. talocalcaneal lig
-interosseous talocalcaneal lig
-peroneal tendons
-sustentaculum tali and medial talar tubercle
Structures limiting Subtalar eversion
-tibiocalcaneal lig (deltoid)
-med talocalcaneal lig
-interosseous talocalcaneal lig
-post tib, FDL and FHL tendons
-lat talar process
Midtarsal Joint
-2 axes of motion
-long axis: mainly inv/ever
-oblique: PF&DF, ER&IR
Midtarsal Joint Pronation
eversion, ER, and DF
-medial arch drops
-midfoot more MOBILE
-coincides with subtalar movement
-occurs at heel strike
Midtarsal Joint Supination
inversion, IR, and PF
-midfoot RIGID for transfer of weight from hindfoot to forefoot
-occurs at heel off and toe off
-conincides with subtalar mvmt
Forefoot Supination Twist
-ray 1 & 2: DF
-ray 4 & 5: PF
forefoot inverts
occurs from heel strike to initial loading
Forefoot Pronation Twist
-ray 1 & 2: PF
-ray 4 & 5: DF
forefoot everts
occurs from heel off to toe off
Standing forces on foot
60% across heel
28% forefoot
8% midfoot
4% toes
Walking forces on foot
vertical force highest at foot flat, decrease slightly, then increase again at heel off
Plantar Fascia Function
-shock absorber
-distributes forces
-stabilizes midfoot

*inflammation may occur with overuse or bone spur presence
Foot Pronation Muscles
peroneus longus
peroneus brevis
extensor digitorum longus
Foot Supination Muscles
tibialis posterior
gastroc
soleus
tib anterior
ext. hallucis longus