MSK #9 A&P of Ankle/Foot Flashcards
Joint of the ankle and foot
- distal tibiofibular
- talocrural
- subtalar
- midtarsal also called transverse tarsal
- tarsometatarsal (forefoot)
- metatarsophalangeal (forefoot)
- interphalangeal (forefoot)
Articulations of talocrural joint
- formed by distal tibia, distal fibula, and talus
- synovial hinge joint
- 1 degree of freedom
- offers significant stability in dorsiflexion
- become much more mobile in plantarflexion
Talocrural joint: osteokinematic motions
dorsiflexion and plantar flexion
Talocrural joint: Loose packed position
10 degress PF, midway between max inversion and eversion
Talocrural joint: Closed packed position
max dorsifexion
Talocrural joint: Capsular Pattern
PF, DF
Ankle ROM norms
DF 0-20
PF 0-50
Inversion 0-35
Eversion 0-15
Subtalar joint: articulations
- formed by 3 articulations (anterior, posterior, and middle) between talus and calcaneus
- 1 degree of freedom
- anterior and middle are formed by 2 convex facets on talus/2 concave on calcaneus
- posterior formed by concave facet on inferior surface of talus and convex on body of calcaneus
Subtalar joint: osteokinematic motions
inversion, eversion
Subtalar joint: loose packed position
midway between extremes of ROM
Subtalar joint: close packed position
supination
Subtalar joint: capsular pattern
limitation of varus ROM
Midtarsal joint: All the stuff
- midtarsal (transverse tarsal) joint formed by talocalcaneonavicular joint and calcaneocuboid joint
- joint has 2 axes: longitudinal and oblique
- motions around both axes are triplanar
Midtarsal joint: osteokinematic motions
inversion, eversion
Midtarsal joint: loose packed position
midway between extremes of ROM