Lecture 5 - Lower Leg Injuries Flashcards
How many bones are in the foot?
- 26
What is the talo crural joint?
- true ankle joint; allows for dorsiflexion & plantarflexion
- The ankle joint is most stable in dorsiflexion
What is dorsiflexion & plantarflexion?
- Dorsiflexion: 10-20 degrees from 90 degree position or 0 degree
- Plantar flexion: 45-50 degrees from 90 degree position
What are the 4 arches of the foot?
- medial longitudinal arch
- lateral longitudinal arch
- transverse arch
- anterior metatarsal arch
What is the medial longitudinal arch ?
- runs along inside of the foot
What is the lateral longitudinal arch ?
- runs along the outside of the foot
What is the transverse arch?
- runs across the distal heads of the tarsals
What is the anterior metatarsal arch?
- runs over the distal heads of the metatarsals
What is Pes planus?
- the loss of the medial longitudinal arch of the foot, heel valgus deformity, and medial talar prominence
- Known as “flat foot’ or an over-pronated foot
What is pes cavus?
- A foot with an abnormally high plantar longitudinal arch
- known as a supinated foot
What are the 2 main ankle ligaments ?
- planter calcaneo navicular (spring ligament)
- deltoid ligament
What is the plantar calcaneo navicular (spring ligament)?
- holds the medial longitudinal arch’s shape
- Runs form the sustentaculum tali to the navicular made up of many elastic fibers it provides a shock absorbency action to the arch
What is the deltoid ligament?
- holds the tibia, talus, & calcaneus together
What are the 3 lateral ankle ligaments?
- anterior talofibular ligament (ATFL)
- calcaneo fibular ligament (CFL)
- posterior talofibular ligament (PTFL)
What is the anterior talofibular ligament (ATFL)?
- runs from the anterior fibular malleolus to the talus
What is the calcaneo ligament (CFL)?
- runs from the mid fibular malleolus to the calcaneus
What is the posterior talofibular ligament (PTFL)?
- runs from the posterior fibular malleolus to the talus
What are the 4 compartments of the leg?
- anterior compartment
- lateral compartment
- superficial posterior compartment
- deep posterior compartment
What is the anterior compartment of the leg?
- Enclosed by a tight fascia covering from the posterior border of the tibia to the lateral aspect of the leg
- It contains the foot dorsiflexors & toe extensors
What are the 3 muscles of the anterior compartment of the lower leg?
- tibialis anterior, extensor hallicus longus, extensor Digitorum longus
- also contains the anterior tibial artery & the deep perineal nerve
What is the lateral compartment of the leg?
- contains the peroneal muscles that evert the foot
What are the 3 muscles of the lateral compartment of the leg?
- Peroneus Longus, Peroneus Brevis, Superficial Peroneal Nerve
- also contains the tibial artery
What is the superficial posterior compartment of the leg?
- the muscles the plantar flex the foot
What are the 3 muscles of the superficial posterior compartment of the leg?
- gastrocnemius, soleus, plantaris
- also contains the tibial artery