Lec 24 - Anterior Compartment of the Leg Flashcards
The leg is made up of how many compartments?
3 compartments
What are the compartments of the leg
- anterior
- lateral
- posterior
TRUE OR FALSE:
The leg has a medial compartment to it
FALSE
the leg has no medial compartment
Which function is performed by all muscles of the anterior compartment of the leg?
Ankle dorsiflexion
How many muscles make up the anterior compartment of the leg? List them.
4 muscles
- Tibialis anterior
- Extensor Digitorum Longus
- Fibularis Tertius
- Extensor Hallucis Longus
In the leg, what causes division of the muscles in 3 compartments?
the interosseous membrane and extensions of the crural fascia
TRUE OR FALSE:
The crural fascia surrounds all of the leg muscles
TRUE
What are retinacula?
thickenings of the crural fascia that form bands at the ankle joint
The retinaculum is divided into:
superior and inferior extensor retinaculum
What is the function of the retinaculum?
helps to anchor and to prevent the tendons that cross the ankle joints from bowstringing during dorsiflexion
This nerve supplies all of the anterior leg muscles
deep fibular nerve
Name the 2 divisions of the sciatic nerve
- common fibular nerve (lateral)
- tibial nerve (medial)
When does the common fibular nerve divide? Name the divisions
- winds around the neck of the fibula
- divides into deep fibular nerve and superficial fibular nerve
Which major artery is found in the anterior compartment of the leg?
anterior tibial artery
The popliteal artery splits just distal to the _______ into which arteries?
- just distal to the popliteal fossa
- anterior tibial artery and posterior tibial artery
