Tibiofibular and Ankle joint Flashcards
Name these 10 landmarks on the tibia and fibula
describe the superior and inferior tibiofibular joints
superiorly, is a plane synovial joint with anterior and posterior tibiofibular ligaments.
Allows for some gliding movements.
Inferiorly, there is a fibrous joint (syndesmosis) that prevents the tibia and fibula from seperating. Has anterior, posterior and interosseus ligaments. Function in shock absorption, and allows no movement. (except diastasis pathologically)
the tibia articulates with the […..] of the [….] and is the weight bearing bone of the leg.
the smaller fibula lies [….] to the tibia and exists largely for the attachment of […].
condyles of the femur
muscles
name these 10 bones of the foot
most commonly fractures tarsal bone? how does this happen?
calcaneus. usually from jumping and landing hard on the heel of your foot. The talus is much denser than the calcaneus and the force of it exerted down onto the calcaneus during landing also contributes to calcaneus fractures.
the bones of the foot include […] tarsal bones. Of these, the [….] is the only bone that articulates with the ankle/limbs of the lower leg at the […..] joint.
Five metatarsal bones articulate proximally with the […] and distally with the […].
seven
Talus (articulates with tibiofubular joint)
tarsals
phalanges
the ankle is a [….] type joint and functions to move in two directions: [….] and […..]
hinge joint
plantar flexion and dorsiflexion.
the talus is sorrounded by 3 joints, they are:
ankle joint above,
subtalar joint below,
and midtarsal joints infront.
why does the foot tend to angle medially in plantar flexion and laterally in dorsiflexion?
the talus sits in a mortice between the medial and lateral malleolus.
Because the lateral malleolus exrends further distally than the medial, the axis of movement is not horizontal.
most ankle injuries are [….] sprains, damaging the [….]. Why is this?
inversion sprains damaging the lateral collateral ligament. classically the foot is plantar flexed and facing inwards. This ligament is weaker than the medial ‘deltoid’ ligament.
name the indicated joints seen from the dorsal aspect of the foot
which movements are possible at subtalar joint?
inversion and eversion. eversion is 20 degree, inversion is 10 degrees – limited by longer lateral malleolus.
where is the plantar aponeurosis? function?
between calcaneus and metatarsal heads. maintains the longitudinal arches of the foot. binds the skin of the foot for grip and protection.
where are the arches of the foot? function?
2 longitudinal, one transverse
muscular support for dynamic activity.
ligamentous support for static activity.
