The Foot and Ankle Lecture Flashcards
Which bones make up the mid foot
Navicular, Cuboid, Cuneiforms
What is a flat foot posture
Pes Planus
Motion occurs at which articulation of the talocrural joint?
Tibiotalar joint
What bones make up the rear foot?
Calcaneus and Talus
What bones make up the ankle
Tibia and Fibula
What bones make up the forefoot?
Five Metatarsals
14 phalanges
2 sesamoid bone
The foot and ankle consist of __________
26 ireegular bones
30 synovial joint
30 muscles
> 100 ligaments
Where does most motion occurs at three joints
Talocrural
Subtalar
Midtarsal
What joint to proximal, 1 dof hinge joint, and allows plantar and dorsiflexion
Talacrural
What is the talocrural joint designed for ?
Stability
Tibia and talus( tibiotalar joint)=
movement
Tibia and fibular( tibiofibular joint)=
No movement
What joint is distal to the talocrural joint, has articulation betwee the talus and calcaneus and allows eversion and inversion
Subtalar
What are the largest weight-bearing bones in the foot?
Talus and calcaneus
What type of motion doed the subtalar joint allow?
Triplanar motion= Supination and pronation
What type of joint is the subtalar joint?
Plane/Gliding Joint; Oblique axis
What makes up the Calcaneus ?
Calcaneal tubercle
Sustentalculum tali
Peroneal tubercle
What make up the talus?
Anterior ,middle, and posterior faces
What do lateral ligaments restrict?
Inversion
What are the lateral talocrural ligaments?
Anterior talofibular
Calcaneofibular
Posterior Talofibular
What are the medial ligametns?
Deltiod: Anterior Tibiotalar
Tibocalcaneal
Tibionavicular
Posterior Tibiotalar
What does medial joint prevet in the ankel?
Eversion
What are the two joints of the midtarsals?
Calcaneocuboid and Talonavicular
What does the aligment of the axes of these two joints affect?
Mobility of the midfoot
What does the midtaral joints contribute to?
Inversion/Eversion
Abduction/Adduction
Dorsflexion/ Plantarflexion
What is the shock absorbing segement of the foot?
Midfoot
What are the three cuneiforms?
Medial, Intermediate, and Lateral
All joint besides calcaneocuboid and talonavicular are __________ ___________
Gliding Joints
What is the function of the arches of the foot?
Absorb shock
Dissipate ground reaction forces
Increase the foots flexibility
What are the arches of the foot?
Medial Longitudinal arch
Lateral Longitudinal arch
Transverse metatarsal arch
What is the medial longitudinal arch formed by?
Calcaneus, talus, navicular,cuneiforms, and first 3 metatarsals
How is support maintained in the medial longitudinal arch?
Calcaneonavicular ligament and plantar fascia
What is the lateral longitudinal arch formed by?
Calcaneus, cuboid, and forth and fifth metatarsals
What is the transverse metatarsal arch?
Formed by the wedging of the tarsals and the base of the metatarsals
What is the windlass effect?
The windlass mechanism describes the manner by which the plantar fascia supports the foot during weight- bearing activities and provides information regarding the biomechanical stresses placed on the plantar fascia.
What are the nerves of the foot and ankle?
Sural nerve( lateral foot)
Seep and superficial peroneal nerve( dorsal surface)
Saphenous nerve( medial foot)
Lateral and medial plantar nerve (plantar surface)
Tibial nerve and branches of sural nerve ( posterior aspect)
What foot alignment is has a low arch and is related excessive foot pronation
Pes planus
What foot alignment has an high arch and is related to excessive foot supination
Pes cavus
What foot alignment has pronation of the subtalar joint?
Calcaneovalgus
What foot alignment has supination of the subtalar joint?
Calcaneovarus
What is the ROM of plantar flexion
50 degrees
What is the ROM of Dorsifelxion?
20 degrees
What is the ROM of Inversion
20 degress
What is the ROM of Eversion
5 degrees
What is Supination
Inversion+adduction+plantarflexion
What is Pronation?
Everson+ abduction+dorsiflexion
Why do hind foot injuries usually occur?
Compressive factors
Why do Mid foot injuries usually occur?
Excessive lateral movement
Why do forefoot injuries ussually occur?
compressive and tensile forces
What anatomical factors also result in injuries?
Poor gait such as overpronation