Leg Flashcards
Explain organization of crural fascia
Anterior crural intermuscular septum
Posterior crural intermuscular septum
Transverse intermuscular septum
Superior extensor retinaculum attachments
extends from distal tibia to distal fibula
Inferior extensor retinaculum attachments
extends from the calcaneus to the navicular and medial malleolus
Superior fibular retinaculum attachments
extends from the lateral malleolus to the calcaneus
Inferior fibular retinaculum attachments
extends from the inferior extensor retinaculum to the calcaneus
Flexor retinaculum attachments
extends from the medial malleolus to the calcaneus, forming tarsal tunnel
Anterior compartment of the leg contents
Tibialis anterior
Extensor hallucis longus
Extensor digitorum longus
Fibularis tertius
Anterior compartment of the leg actions
Ankle dorsiflexion
Inversion
Toe extension
Ankle eversion if peroneus tertius could be isolated
Anterior compartment of the leg innervation
deep fibular nerve
Anterior compartment of the leg blood supply
anterior tibial artery
Lateral compartment of the leg contents
Fibularis longus
Fibularis brevis
Lateral compartment of the leg actions
Eversion
Plantar flexion
Lateral compartment of the leg innervation
Superficial fibular nerve
Lateral compartment of the leg blood supply
Fibular artery
Superficial posterior compartment of the leg components
Gastrocnemius
Soleus
Plantaris
Superficial posterior compartment of the leg actions
Ankle plantar flexion
Knee flexion
Superficial posterior compartment of the leg innervation
Tibial nerve
Superficial posterior compartment of the leg blood supply
Posterior tibial artery
Deep posterior compartment of the leg components
Popliteus
Flexor digitorum longus
Flexor hallucis longus
Tibialis posterior
Deep posterior compartment of the leg actions
Ankle plantar flexion
Inversion
Toe flexion
Knee flexion
Deep posterior compartment of the leg innervations
Tibial nerve
Deep posterior compartment of the leg blood supply
Posterior tibial artery
Extensor digitorum longus attachments
from… the lateral tibial condyle, proximal 3/4th of the fibula and crural interosseous membrane
to… the dorsal digital expansions of toes 2-5
Extensor digitorum longus actions
Dorsiflexes ankle
Extends digits 2-5 (IP & MP)
Extensor digitorum longus innervation
Deep fibular nerve (L4-5-S1)
Extensor hallucis longus attachments
from… the middle 1/2 of the fibular surface & crural interosseous membrane
to… the distal phalangeal base of the 1st toe
Extensor hallucis longus actions
Dorsiflexes ankle
Extends great toe (MP & IP)
Extensor hallucis longus innervation
deep fibular nerve (L4-5-S1)
Fibularis tertius attachments
from… the distal fibula and crural interosseous membrane
to… the base of the 5th metatarsal
Fibularis tertius actions
Dorsiflexes ankle
Everts foot
Fibularis tertius innervation
deep fibular nerve (L4-5-S1)
Tibialis anterior attachments
from… the lateral condyle and proximal 2/3rds of the tibia’s lateral surface & crural interosseous membrane
to… the medial cuneiform & adjacent 1st metatarsal
Tibialis anterior actions
Dorsiflexes ankle
Inverts foot
Tibialis anterior innervation
deep fibular nerve (L4-5-S1)
Fibularis longus attachments
from… the head & proximal 2/3rds of the fibula
to… the lateral aspects of the 1st metatarsal & adjacent medial cuneiform
Fibularis longus actions
Everts foot
Plantar flexes ankle
Depresses 1st metatarsal head