Anterior And Lateral Leg, Dorsum Of Foot Flashcards
Tibialis anterior insertion
Medial and inferior surfaces of medial cuneiform
Base of the 1st metatarsal
Tibialis anterior origin
- Lateral condyle of tibia
- superior two thirds of lateral surface of tibia and interosseous membrane
Innervation for all muscles of the anterior leg
Deep fibular nerve
Tibialis anterior action
Dorsiflexes ankle
Inverts foot
Extensor hallucis longus origin
Middle part of anterior surface of fibula and interosseous membrane
Extensor hallucis longus insertion
Dorsal aspect of base of distal phalanx of great toe (hallux)
Extensor hallicus longus action
Extends big toe, dorsi flexes ankle
Extensor digitorum longus origin
- Lateral condyle of tibia
- Superior two thirds of anterior surface of fibula and interosseous membrane
Extensor digitorum longus insertion
Middle and distal phalanges of lateral four digits
Extensor digitorum action
Extends lateral four digits
Dorsiflexes ankle
Fibularis tertius origin
Inferior third of anterior surface of fibula and interosseous membrane
Fibularis tertius insertion
Dorsum of base of 5th metatarsal
Fibularis tertius action
Dorsi flexes ankle
What is the common action for the anterior leg muscles
Dorsi flexes ankle
Fibularis longus origin
Head and superior two thirds of lateral surface of fibula
Fibularis longus insertion
Base of first metatarsal and medial cuneiform
Common innervation for the lateral compartment of the leg
Superior fibular nerve
Common action for the muscles of the lateral compartment of the leg
Evert foot
Weakly planterflex ankle
Fibularis brevis origin
Middle part of lateral surface of fibula
Fibularis brevis insertion
Dorsal surface of tuberosity of base of 5th metatarsal
retinacula
- bound the anterior compartment of the leg inferiorly
- two bands of deep fascia that help to bind the muscle tendons
- preventing the tendons from bow-stringing
(Just like the retinaculum of the wrist)
superior extensor retinaculum
- boundary of the anterior compartment of the leg
- runs from fibula to tibia
- strong
inferior extensor retinaculum
- “Y” shaped
- boundary of the anterior compartment of the leg
- forms a strong loop around the tendons of fibularis tartius and extensor digitorum longus
extensor digitorum brevis (EBD) and extensor hallucis brevis (EHB)
- EHB is a part of EBD
- forms a mass on the lateral part of the dorsum of the foot
- they aid Extensor digitorum and extensor hallucis longus in extending digitis 1-4
- inntervated by deep fibular nerve
Deep femoral nerve
- one of the two terminal branches of common fibular nerve
- supplies the anterior compartment
- runs with anterior tibial artery
anterior tibial artery
- branch of the popliteal artery
- when it enters the ankle it then becomes dorsalis pedis artery
what muscles are in the lateral compartment of the leg
fibularis longus
fibularis brevis
superior fibular nerve
- 2nd terminal branch of the common fibular nerve
- after they supply the two muscles of the lateral compartment it continues as a cutaneus nerve
footdrop
injury to the common fibular nerve
ankle joint
- hinge synovial
- talocrual articulation
- tibia/fibula with tarus
malleolar mortise (deep socket)
- the distal end of the tibia and fibula form this
- the pulley shaped trochlea of the talus fits into here
what helps stablize the ankle joint from being spread apart
-strong interosseous tibiofibular ligament
along with anterior and posterior tibiofibular ligaments
what reinforces the ankle joint laterally
lateral ligament of the ankle (three seperate ligaments make this up)
anterior talofibular ligament
- part of the lateral ligament of the ankle
- flat, weak
- lateral malleolus to neck of the talus
posterior talofibular ligament
- part of the lateral ligament of the ankle
- thick, fairly strong
- runs from the malleolar fossa of fibula to lateral tubercule of the talus
calcaneofibular ligament
- part of the lateral ligament of the ankle
- tip of the lateral malleolus to the lateral surface of the calcaneus
what reinforces the ankle joint medially
-Medial ligament of the ankle (Deltoid Ligament)
Medial ligament of the ankle (Deltoid ligament)
- large, strong
- runs from medial malleolus then fans to attach to the talus, calcaneus and navicular (has four part)
What are the four parts of the deltoid ligament?
-tibionavicular, tibiocalcaneal, anterior and posterior tibiotalar
what are the movements of the ankle joint
- dorsiflexion
- plantarflexion (wobble as well, which is abduction, adduction, inversion, eversion)
(these movements occur during plantarflexion due to the weakness in the joint during that motion)
plantarflexion
muscles in the posterior and lateral compartment of the leg
dorsiflexion
-mainly done by the anterior compartment of the leg
what are the four muscles of the anterior leg
tibialis anterior
extensor digitorum longus
extensor hallucis longus
fibularis tertius
What formed the leg?
Anterior and posterior intermuscular septum, interosseous membrane, two leg bones
What is the intermuscular septum
Continuation of deep fascia of the leg, that projects in to help to seperate the compartment of the leg.
(Anterior and posterior to seperate the three compartments)
(The transverse separates the deep and superficial posterior compartments)
What are the three compartment of the thigh
Posterior
Anterior
Medial
What are the three muscles of the leg
Anterior
Posterior
Lateral
