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35 Cards in this Set
- Front
- Back
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Proximal tibiofibular joint support |
-capsule
-ant/post tibiofibular LL -popliteus tendon |
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Distal Tibiofibular joint |
-syndesmosis Support: - interosseus L - ant/post tibiofibular LL |
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Tibiofibular joint arthrokinematics |
DF - superior glide of fibula PF - inferior glide of fibula |
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Talocrural Joint |
-between trochlea of talus and the distal tib/fib -has an oblique axis (running through the malleoli) |
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Closed pack position of the talocrural joint? |
-DF |
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Connective tissue of ankle |
-joint capsule -MCL (deltoid) -runs from MM to navicular, calcaneus, talus -limits eversion -LCL |
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Lateral collateral L |
Ant Talofib - resist supination - most common injured Post talofib - stabilize talus in mortise joint, especially in abd Calcanfib - resist inversion and DF Inf trans - post wall of talocrural joint |
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Talocrural joint axis |
-10 degrees superior and 6 degrees anteriorly |
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PF and DF |
P - 40-45 degrees D - 15-25 degrees |
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Distal on Proximal Talocrural DF and PF |
DF - ant roll and post slide PF - post roll and ant slide |
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Subtalar joint |
-made by the post/ant/mid articulations of talus and calcaneus |
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3 articulations of subtalar joint |
Post - concave talus on convex calcaneus - 70% of movement occurs here Mid/ant - small and flat |
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Subtalar LL |
Med/Post/Lat talocalcan LL - reinforce post cap Calcanfib - limit inversion Deltoid (tibcalcan) - limit EV Interosseus - limit inversion |
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Subtalar Pronation and supination |
-most of the eversion/inversion and abd/adduction occurs at this joint P - 5-10 degrees S - 20 degrees |
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Subtalar supination in non-WB and WB |
non - calcaneal inv/add/pf WB - calcaneal inv, talar abd/df, tibfib lat rot |
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Subtalar pronation in non-WB and WB |
non - calcaneal ev/abd/df WB - calcaneal ev, talar add/pf, tibfib med rot |
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Talonavicular Joint |
-ball and socket joint -convex talus and concave navicular |
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LL of Talonavicular joint |
plantar calcaneonavicular L (spring) - from sustentaculum talus to navicular interosseus L dorsal talonavicular L bifurcated L deltoid (ant tibnavic) |
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Calcaneocuboid joint LL |
-dorsal calcaneocuboid L
-bifurcated L -long and short plantar LL |
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Subtalar J effects on midfoot |
-pronation promotes mobility of midfoot -supination promotes stability of midfoot |
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What is the axis for movement in the transverse tarsal joint |
Inv/Ev - occur in longitudinal axis Abd/Add/DF/PF - occur in oblique axis |
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Medial Longitudinal Arch |
-primary load bearing structure Support - plantar fascia, spring L, 1st TMT joint |
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Plantar Fascia |
-primary support of med long arch -DF and MTP ext increases tension |
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Windlass mechanism |
-when the MTP joint extends the plantar fascia pulls the medial long arch up |
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Standing position |
-BW falls at talonavicular joint -BW flattens arch and stretches plantar fascia |
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Pes Planus |
-"flat foot" -caused by either overpronation of subtalar, overstretched LL, or failure of post tib tendon Rigid - flat in NWB Flexible - flat only in WB |
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Pes Cavus |
-high arch -hypomobile subtalar joint or oversupination of subtalar or MT joint -caused by a tight plantar fascia or overpronation with calcaneal varus |
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Gait Cycle |
-during initial part (WB) the foot pronates and the med long arch lowers -during the late part the foot supinates and the med long arch raises |
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Distal Intertarsal Joints |
-cuneonavicular -cuboideonavicular -intercuneiform -cuneocuboid -assist in pro/sup |
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Central Pillar of foot |
-2nd MT joint -used when about to push off during gait |
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Ant compartment MM during gait |
Stance - eccentric control of PF Swing - concentric DF |
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Lat compartment MM during gait |
Stance - provide lat stability by controlling supination - keeps 1st ray on ground |
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Tibialis Posterior |
-supports spring lig and med long arch |
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What passes through the tarsal tunnel? |
-tib post and FDL |
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Post compartement during gait |
stance - eccentric deceleration of DF and resisting pronation Toe-off - concentric PF and supination |
