Ankle and Foot Region Flashcards
What is the sustentaculum tali?
a horizontal eminence on the upper and forepart of the medial surface of the calcaneus
The sustentaculum tali supports the head of what bone?
talus
The muscle tendon runs through the groove on the inferior surface of the sustentaculum tali?
flexor hallucis longus tendon
Describe the navicular bone
It is the boat-shaped tarsal bone between the head of talus and cuneiform bones
Which tarsal bone is the most laterally placed?
cuboid
What muscle tendon runs through the groove on the lateral side of the cuboid bone?
fibularis longus tendon
The cuneiform bones form part of what arches?
medial longitudinal and proximal transverse arches
The ankle joint consists of what 3 articulations?
- Inferior surface of distal tibia with talus
- Medial malleolus of tibia with talus
- Lateral malleolus of fibula with talus
What type of joint is the ankle joint?
Synovial Hinge Joint
What movements occur at the ankle joint?
dorsiflexion and plantarflexion
Is the ankle joint more stable when the foot is dorsiflexed or plantarflexed? Why?
Joint is more stable when the foot is dorsiflexed because the wider surface of the talus moves into ankle joint . When the foot is plantarflexed the narrow part of the talus is in the joint
The ankle joint is reinforced laterally by what ligament?
Lateral ligament of the ankle
The lateral ligament is subdivided into what 3 separate ligaments?
- Anterior talofibular
- Posterior talofibular
- Calcaneofibular
The lateral ligament resists what motion?
- Inversion of the foot
Which ligament is often times torn in an ankle sprain?
Anterior talofibular
The ankle joint is reinforced medially by what ligament?
Medial (Deltoid) Ligament
The medial ligament is subdivided into what 4 separate ligaments?
- Tibionavicular
- Tibiocalcaneal
- Anterior tibiotalar
- Posterior tibiotalar
The medial ligament resists what motion?
over eversion of the foot
The medial ligament helps to maintain what arch?
medial longitudinal ligament
Would too much pronation of supination stretch the medial ligament?
pronation
Because of this it may be weak in females who are more prone to pronation and flat feet
What is the name of the joint whose articulating surfaces are the inferior surface of the talus and the superior surface of the calcaneus?
Subtalar (Talocalcaneal) Joint
What type of joint is the subtalar joint?
Planar, synovial joint
What motions occur at the subtalar joint?
inversion and eversion of foot
What is the name of the joint whose articulating surfaces are the head of the talus and the concave calcaneus and navicular bones?
Talocalcaneonavicular
What type of joint is the Talocalcaneonavicular joint?
ball and socket
What motions occur at the Talocalcaneonavicular joint?
inversion and eversion
What is the name of the joint whose articulating surfaces are the anterior end of the calcaneus and the posterior surface of the cuboid?
Calcaneocuboid Joint