Ankle Joint Flashcards
The ankle joint is formed by three bones:
tibia, fibula & talus
The expanded distal end of the slender fibula, which extends well down alongside the talus, is called
lateral malleolus
The medial elongated process of the tibia that extends down alongside the medial talus, is called
medial malleolus
The inferior portions of the tibia and fibula form a deep “socket”, or “three-sided” opening, called a _________ into which the superior talus fits
mortise
A 15° internally rotated AP oblique projection called the _________ is performed to demonstrate the mortise of the joint, which should have an even space over entire talus surface
mortise position
The distal tibial joint surface that forms the roof of the ankle mortise joint is called
tibial plafond (ceiling)
-15 to 20° to bring the intermalleolar line parallel plane.
- visualizes an “end-on” view of the ankle joint looking from the bottom up, demonstrating the concave inferior surface of the tibia (tibial plafond)
Axial View
Synovial joint, sellar type (flexion & extension), dorsiflexion and plantarflexion movements only
Ankle joint
can result in a “sprained” ankle with stretched or torn collateral ligaments and torn muscle tendons leading to an increase in parts of the mortise joint space
Lateral stress
can be performed to evaluate the stability of the mortise joint space
AP stress views
the second group of bones of the lower limb is the
tibia & fibula
- one of the largest bones of the body
- weight bearing bone of the lower leg
- can be easily through the skin in the anteromedial part of the leg
Tibia
What are the two large processes that make up the medial and lateral aspects of the proximal tibia?
medial and lateral malleolus
is a rough-textured prominence located on the mid-anterior surface of the tibia just distal to the condyles
Tibial tuberosity
tibial tuberosity separates from the body of the tibia, a condition known as
Osgood-schlatter disease
Sulcus means
groove or depression
Trochlea means
pulley or pulley-shaped structure
best demonstrates the two large, rounded condyles that are separated distally and posteriorly by the deep intercondylar fossa or notch
Midfemur or distal femur - posterior view
a flat triangular bone about 2” (5 cm) in diameter
Patella (kneecap)
a large complex joint that primarily involves the femorotibial joint between the two condyles of the femur and the corresponding condyles of the tibia
Knee Joint
a large complex joint that primarily involves the femorotibial joint between the two condyles of the femur and the corresponding condyles of the tibia
Knee Joint
The single exception to the synovial joint is the __________ wc is classified as a FIBROUS JOINT with fibrous interconnections between the surfaces of the tibia & fibula
distal tibiofibular joint
distal tibiofibular joint is _______ type and is only slightly movable or _____
syndesmosis type, amphiarthrodial
