Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
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 |
