Anterior Leg Compartment O&I Flashcards
Tibialis anterior origin
Tibia, interosseus membrane, and fibula
tibialis anterior insertion
Base of the 1st metatarsal, medial cuneiform
tibialis anterior nerve
deep fibular nerve
tibialis anterior action
inversion and dorsiflexion of foot
Extensor hallicus longus origin
tibia, interosseus membrane, and fibula
extensor hallicus longus insertion
distal phalanx of great toe
extensor hallicus longus innervation
deep fibularis nerve
extensor hallicus longus action
extension of great toe, inversion of foot, can dorsiflex foot too
extensor digitorum longus origin
tibia, interosseus membrane and fibula
extensor digitorum longus insertion
extensor expansion of digits 2-5
extensor digitorum longus action
extension of digits 2-5, dorsiflexion of foot
fibularis Tertius origin
fibula
fibularis Tertius insertion
base of 5th metacarpal
fibularis Tertius innervation
deep fibular nerve
fibularis Tertius action
eversion and dorsiflexion of foot
The muscle tendons of the 4 anterior leg compartment muscles ____cross over each other as they pass underneath the extensor retinacula and remain in ____
do not
order
Which muscle sometimes has a distinct muscle belly, but often it’s muscle fibers cannot be distinguished from extensor digitorum longus?
fibularis Tertius
Unlike the extensor digitorum longus tendons, the fibularis Tertius tendons do not cross the ___,____, and ___ joints
MCP, PIP, DIP
What artery and vein supply the anterior compartment of the leg?
anterior tibial artery and vein
The dorsum of the foot contains which two muscles?
extensor hallicus brevis
extensor digitorum brevis
What innervates the dorsum of the foot?
Deep fibularis nerve
extensor digitorum brevis origin
calcaneus
extensor digitorum brevis insertion
extensor expansion of digits 2-4
extensor hallicus brevis origin
calcaneus
extensor hallicus brevis insertion
base of proximal phalanx of digit 1
