Anterior and Lateral Leg Compartment Session 33 Flashcards
where is the leg
between the knee and ankle joint
what is the fascia like in the leg?
deep fascia surround the leg like a sleeve
what does the intermuscular septa extend from and what does it do
extends from deep fascia
separates leg into anterior, lateral and posterior compartments
name the 3 muscles of the anterior compartment
tibialis anterior
extensor hallucis longus
extensor digitorum longus
what is the innervation and arterial supply of the anterior compartment
deep peroneal nerve (deep because it penetrates from the posterior of leg)
anterior tibial artery
what is the origin of all the anterior compartment muscles
tibia, fibula and interosseus membrane
what is the path, insertion and action of tibialis anterior
path from origin: crosses anterior aspect of ankle medially
inserts: onto medial cuneiform
action: dorsiflexes and inverts foot
what is the path, insertion and actions (3) of extensor hallucis longus
path from origin: tendon crosses anterior aspect of ankle
insertion: distal phalanx of big toe
action: dorsiflexes foot at ankle, inverts foot and extends big toe
what is the path, insertion and action of extensor digitorum longus
how many tendons does it give rise to
path from origin: 4 tendons cross anterior aspect of ankle
insertion: distal phalanges of toes 2-5
action: dorsiflexes foot at ankle joint and extends to 2-5
4 tendons
where is the dorsalis pedis pulse, what artery is it and what is the artery a continuation of
between tendons of extensor digitorum longus and hallucis longus
dorsalis pedis artery
anterior tibial artery
what 2 muscles r in the lateral compartment of the leg
peroneus longus and brevis
what is the innervation and arterial supply of the lateral compartment of the leg
superficial peroneal nerve
peroneal artery
what is the origin and action of peroneaus longus and brevis
attachment: fibula
action: evert foot at subtalar joint
what is the relationship between peroneus longus and brevis
longus to more superficial than brevis
what is the insertion of peroneus longus
plantar surface of medial cuneiform bone
what is the insertion of peroneus brevis
base of 5th metatarsal
what is the path of the tendons of the peroneus longus and brevis
travel posterior to the lateral malleolus
what r the two end branches of the common peroneal nerve
deep and superficial
what do the superficial and deep peroneal nerves innervate
deep: anterior muscles of leg
superficial: lateral muscles of leg
what is the path of the common peroneal nerve
crosses across the posterior aspect of head of fibula
then lies lateral to the neck of the fibula
goes under peroneus long where it splits
what does the popliteal artery split into and where
popliteal fossa
anterior and posterior tibial artery
what r the three different bone groups in the foot
phalanges, metatarsals, tarsals
how many tarsals r there and name them
7
talus, calcaneus, navicular, medial cuneiform, intermediate cuneiform, lateral cuneiform, cuboid
what is the mnemonic to remember the tarsals
trolls cant name multiple important lakes correctly
what r the metatarsals in between and how many r there
tarsals and phalanges
5
how many phalanges r there in the toes and what r they called)
toes 2-5: 3 phalanges (proximal, middle, distal)
toe 1: 2 phalanges (proximal, distal)
what r the three regions of the foot
forefoot, midfoot and hindfoot
what is the forefoot
metatarsals and phalanges
what is the midfoot
cuneiforms and cuboid and navicular
what is the hindfoot
talus and calcaneus
where r metatarsophalangeal and interphalangeal joints located
between metatarsals and proximal phalanges
in between phalanges
what r the 4 movements of the foot and at what joint r they located (be able to demonstrate them)
dorsiflexion, plantarflexion- ankle joint
inversion, eversion- subtalar joint
what r the four movements of the toes
flexion
extension
adduction
abduction
what r the arches of the foot raised by (2) and what forms the arches
longitudinal and transverse arches of the foot
arrangement of bones of the foot
what is the purpose of the arches of the foot
shock absorption
what r the two bones of the leg and which is medial and lateral
tibia and fibula
fibula is lateral, tibia is medial
what is the ankle joint formed by (3)
tibia, fibula, talus
what part of the tibia and fibula contribute to the ankle joint
tibia= medial malleolus fibula= lateral malleolus
what is the subtalar joint formed by (3)
talus and calcaneus and navicular
what is the knee joint formed by (3)
patella, femur and tibia
what part of the tibia forms the knee joint
lateral and medial tibial plateaus
what lies betwen the tibial plateus
intercondylar tubercles
what r the two main superficial veins that drain the foot
great and small saphenous vein
what is the path of the great saphenous vein and where does it terminate
travels anterior to medial malleolus and up the medial aspect of the leg terminates at femoral vein in femoral triangle
what is the path of the small saphenous vein and where does it terminate
travels posterior to the lateral malleolus and up posterior aspect of leg
terminates at popliteal vein in popliteal fossa
what is the dorsal surface of the foot
top of the foot
what is the small muscle in the dorsum of the feet called
extensor digitorum brevis
tendons of extensor digitorum brevis (how many and where to) and what is it innervated by
4 tendons to toes 2-5
innervated by deep peroneal nerve
what is the arterial supply of the anterior leg and what is this a branch of
anterior tibial artery, popliteal artery
what is the arterial supply of the lateral leg and what is this a branch of
fibular arteries, posterior tibial artery
