Exam 1 - Lower leg Flashcards
What are the muscles of the Anterior leg?
Tibialis anterior, Extensor digitorum longus, Extensor hallicis longus, Fibularis terius
What are the muscles of the Lateral leg?
Fibularis longus, Fibularis brevis
What are the muscles of the Superficial Posterior leg?
Gastrocnemius, Soleus, Plantaris
What are the muscles of the Deep Posterior leg?
Popliteus, Flexor hallicus longus, Flexor digitorum longus, Tibialis posterior
What is the origin of Tibialis anterior?
lateral tibial condyle and the upper lateral surface of the tibia
What is the insertion of Tibialis anterior?
medial surface of the medial cuneiform and the 1st metatarsal
What are the functions of Tibialis anterior?
dorsiflexes and inverts the foot
What innervates the Tibialis anterior?
deep fibular (peroneal) nerve
What supplies blood to Tibialis anterior?
anterior tibial a.
What is the origin of Extensor digitorum longus?
lateral condyle of the tibia, anterior surface of the fibula, lateral portion of the interosseous membrane
What is the insertion of Extensor digitorum longus?
dorsum of the lateral 4 toes via extensor expansions (central slip inserts on base of middle phalanx, lateral slips on base of distal phalanx)
What is the function of Extensor digitorum longus?
extends the metatarsophalangeal, proximal interphalangeal and distal interphalangeal joints of the lateral 4 toes
What innervates Extensor digitorum longus?
deep fibular (peroneal) nerve
What supplies blood to Extensor digitorum longus?
anterior tibial a.
What is the origin of Extensor hallicis longus?
middle half of the anterior surface of the fibula and the interosseous membrane
What is the insertion of Extensor hallicis longus?
base of the distal phalanx of the great toe
What are the functions of Extensor hallicis longus?
extends the metatarsophalangeal interphalangeal joints of the great toe
What innervates Extensor hallicis longus?
deep fibular (peroneal) nerve
What supplies blood to Extensor hallicis longus?
anterior tibial a.
What is the origin of Fibularis tertius?
distal part of the anterior surface of the fibula
What is the insertion of Fibularis tertius?
dorsum of the shaft of the 5th metatarsal bone
What are the functions of Fibularis tertius?
everts the foot
What innervates the Fibularis tertius?
deep fibular (peroneal) nerve
What supplies blood to Fibularis tertius?
anterior tibial a.
What is the origin of Fibularis longus?
upper two/thirds of the lateral surface of the fibula
What is the insertion of Fibularis longus?
after crossing the plantar surface of the foot deep to the intrinsic muscles, it inserts on the medial cuneiform and the base of the 1st metatarsal bone
What are the functions of Fibularis longus?
extends (plantar flexes) and everts the foot