Foot And Ankle Flashcards
What is the primary weight-bearing bone of the leg?
Tibia
How does the size of the fibula compare to the tibia?
Much smaller than the tibia
What structure links the tibia and fibula along their lengths?
Interosseous membrane
List the functions of the foot and ankle region.
- Provides a stable base of support
- Provides a rigid lever for propulsion
- Absorbs the shock of weight bearing
- Conforms and adapts to uneven surfaces
- Important role in sensation / proprioception / balance
- Allows adjustment of line of gravity in standing
- Provides propulsion & restraint in walking
What is the shape of the distal tibia?
S-shaped like a rectangular box
What articulates with the lower surface of the distal tibia?
Talus
What is the bony protuberance on the lateral side of the fibula called?
Lateral malleolus
What are the three groups of bones in the foot?
- Tarsal bones
- Metatarsals (I to V)
- Phalanges
What are the proximal tarsal bones?
- Talus
- Calcaneus
What is the intermediate tarsal bone?
Navicular
Name the distal group of tarsal bones.
- Cuboid
- Cuneiforms (medial, intermediate, lateral)
What does the head of the talus articulate with?
Navicular
What is the largest tarsal bone?
Calcaneus
What is the prominent feature on the medial surface of the calcaneus?
Sustentaculum tali
What shape is the navicular bone?
Boat-shaped
What articulates with the anterior surface of the navicular?
Cuneiforms
What are the three types of cuneiform bones?
- Lateral
- Intermediate
- Medial
How many metatarsals are in the foot?
Five
What are the components of each metatarsal?
- Head
- Shaft
- Base
What condition is related to the fracture of Metatarsal V?
Iselin’s apophysitis
How many phalanges does each toe have?
Three, except for the great toe which has two
What are the components of each phalanx?
- Head
- Shaft
- Base
What structures make up the ankle?
Talus of the foot and the distal tibia and fibula of the leg
What are the superior and inferior surfaces of the foot called?
- Superior surface: dorsum
- Inferior surface: sole