Lower Limb 3 Flashcards
The musculature of the leg is divided into 3 compartments.
Name them
Anterior, Posterior and lateral
How does the fibularis tertius lie in relation to the extensor digitorum longus?
Lateral
What are the 4 muscles in the anterior compartment of the leg?
Tibialis anterior
Extensor hallucis longus
Extensor digitorum longus
Fibularis tertius
What are the 2 main branches of the common fibular nerve?
Superficial fibular nerve
Deep fibular nerve
The anterior tibial artery gives rise to what artery of the foot?
Dorsalis pedis
What are the two branches of the sciatic nerve?
Tibial nerve
Common fibular nerve
Which branch of the common fibular nerve innervates the muscles of the anterior compartment of the leg?
Deep fibular (peroneal) nerve
Which terminal branch of the popliteal artery supplies the anterior leg?
Anterior tibial artery
Which artery runs midway between the malleoli?
Dorsalis pedis
The lateral compartment of the leg contains two muscles.
What are they?
Fibularis longus
Fibularis brevis
What are the actions of the muscles in the lateral compartment of the leg?
Evert the foot
Weakly planterflex the ankle joint
Which fibular nerve is the nerve of the lateral compartment of the leg?
Superficial
List the reasons of injury to common fibular nerve and foot drop
Direct trauma
Severed during fracture
Stretched when knee is injured or dislocated
Which group of muscles are affected by injury to common fibular nerve?
Anterior and lateral
What type of joint is the ankle joint?
Hinge synovial
What are the articulating surfaces of the ankle joint?
The distal end of the tibia and fibula with the trochlea (superior part) of the talus bone
When do the malleoli grip the talus tightly?
When is the malleolar grip strongest?
When is the ankle joint unstable?
During the movements of the ankle bone
Strongest during dorsiflexion of the ankle
Unstable during plantarflexion
Which ligament of the ankle joint is weakest?
Anterior talofibular ligament
Which ligament of the ankle joint is named deltoid ligament?
Medial ligament of the ankle
During which movements of the subtalar joint are ankle sprains more common?
Inversion injury
What type of joint is the superior or proximal tibio-fibular joint?
Plane type of synovial joint
What type of joint is the inferior or distal tibia-fibular joint?
Syndesmosis
What ligaments join the tibia and fibula together?
Tibiofibular ligaments (anterior and posterior)
What ligaments join the fibula to the talus?
anterior and posterior talofibular ligament
What are the 4 parts of the deltoid (medial) ligament?
Posterior Tibiotalar part
Tibiocalcaneal part
Tibionavicular part
Anterior Tibiotalar part
What ligament joins the fibula and the calcaneus on the lateral side?
Calcaneofibular ligament
