Muscles of the lower limb- Lower leg myology Flashcards
Anterior compartment (superficial): Extensor digitorum longus
O: Lateral condyle of tibia
I: Along dorsal surface of the four lateral toes. Each tendon divides, to attach to bases of middle and distal phalanges
N: Deep fibular(peroneal) nerve (L5,S1)
B: Branch of popliteal artery: the anterior tibial artery
A: Extends lateral four toes and dorsiflexes foot
Anterior compartment (superficial): Tibialis anterior
O: Lateral condyle of tibia and adjacent interosseous membrane
I: medial cunieform and on base of first metatarsal
N: Deep fibular nerve, L4,5
B: branches of anterior tibial artery.
A: Dorsiflexes foot at ankle joint. Inverts foot. Dynamic support of medial arch of foot.
Anterior compartment (deep): Extensor hallucis longus
O: Medial surface of middle fibular and adjacent interosseous membrane
I: Dorsal aspect of distal phlanax 1 (as dorsal digital expansion)
N: Deep fibular nerve
B: Anterior tibial artery
A: Extends great toe
Lateral compartment: Fibularis brevis
O: Distal half of body of fibula
I: Base of 5th metatarsal
N: Superficial fibular nerve
B: Anterior tibial artery, branch of the popliteal artery
A: Dorsiflexion of ankle, eversion of ankle
Lateral compartment: Fibularis longus
O: Head of fibula
I: Medial cuneiform and base of 1st metatarsal
N: Superficial fibular nerve
B: Fibular artery which is a branch of the posterior tibial artery
A: Plantarflexion of ankle, Eversion of ankle, Supports transverse arch
: Posterior compartment (Superficial): Plantaris
O: Lateral supracondylar line of femur
I: Posterior aspect of calcaneus
N: Tibial nerve
B: (Lateral sural artery) which is a branch of the popliteal artery
A: Weak plantaflexion of ankle. Weak knee flexion.
Posterior compartment (superficial): Soleus
O: Head and superior 1/4 of fibula.
I: Posterior aspect of calcaneous
N: Tibial nerve S1,2
B: Posterior tibial artery
A: Plantarflexion of ankle
Posterior compartment (superficial): Gastrocnemis (lateral head)
O: Lateral femoral condyle
I: Posterior aspect of calcaneus
N: Tibial nerve
B: Lateral and medial sural arteries
A: Plantarflexion of ankle, Flexion of knee
Posterior compartment (superficial): Gastrocnemius (medial head)
O: Medial femoral condyle
I: Posterior aspect of calcaneus
N: Tibial nerve
B: Lateral and medial sural arteries
A: Plantar flexes foot. Flexes knee. It is a main propelling force in walking and running
Posterior compartment (deep): Popliteus
O: Lateral condyle of femur and lateral meniscus
I: Posterior surface of proximal tibia
N: Tibial nerve
B:Branches of popliteal artery- inferior medial and lateral genicular arteries
A: Weak knee flexion. Medially rotates leg at knee
Posterior compartment (deep): Tibalis posterior
O: Posterior surfaces of proximal tibia
I: Navicular tuberosoity, cuneiforms, cuboid, 2-4 metatarsals
N: Tibial nerve L4, 5, S1
B: Branches posterior tibial artery stems from popliteal artery
A: Plantar flexion of ankle. Inversion of ankle
Posterior compartment (deep): Flexor hallucis longus
O: Inferior 2/3 of posterior fibula and interosseous membrane
I: Plantar aspect of distal phalanx 1
N: Tibial nerve
B: Posterior tibial artery, fibular artery
A: Plantarflexion or ankle. Flexion of great toe.
Posterior compartment (deep): Flexor digitorum longus
O: Medial 1/3 of posterior tibia, distal to soleal line
I: Plantar aspect of distal phalanges 2-5
N: Tibial nerve L5, S1
B: Branches of posterior tibial artery which is a terminal branch of the popliteal artery
A: flexes phalanges 2-5, plantar felxion
What are the borders of the popliteal fossa?
Superomedial: Semimembranosus, Semitendonosus
Lateral: Biceps femoris
Inferior: Gastrocnemius
Floor: Knee joint capsule, distal femur, proximal tibia, popliteus
Roof: Popliteal fascia
What are the contents of the popliteal fossa?
Nerves: Tibial nerve
Vessels: popliteal artery and vein
Lymph nodes: superficial and deep popliteal lymph nodes
