Lower Leg Flashcards
Borders of tibia shaft
anterior, medial and lateral
Surfaces of tibia shaft
medial, lateral, posterior
Distal tibia surfaces
5-anterior, posterior, medial, lateral and inferior
What surface of the distal tibia forms the fibular notch?
lateral surface
The anterior surface of the distal tibia is continuous with what?
lateral tibial shaft
What are the borders of the fibula shaft?
anteromedial, anterolateral, posterolateral, posteromedial
What are the surfaces of the fibula shaft?
anterior, lateral, posterior, medial
What type if joint is the tibiofibular syndesmosis?
fibrous joint
What is the saphenous N a continuation of and what does it inervate?
from femoral N, innervates medial (posterior and anterior) skin of leg
Where does the medial sural cutaneous N come from?
from tibial N
Where does the lateral sural cutaneous N come from and what does it do?
from common fibular, gives off communicating branch to join with medial sural cutaneous N from the tibial N to form the sural N
What forms the sural N and what does it give off?
medial sural cutaneous from tibial N and communicating branch of lateral sural cutaneous N from common fibular N, gives off lateral dorsal cutaneous N
What is the course of the saphenous N? What does it supply?
branch of femoral, stays deep under sartorius, follows femoral A until the knee when it pierces fascia and becomes cutaneous
supplies cutaneous to medial portion of leg
What creates the compartments of the leg? What are the compartments?
crural fascia forms it, anterior, lateral and posterior compartments
General action, innervation and blood supply to anterior compartment?
dorsiflexion, extend MP joints, deep peroneal N, anterior tibial A
General action, innervation and blood supply to lateral compartment?
eversion, superficial peroneal N, perforating branches from anterior tibial and peroneal A
General action, innervation and blood supply to superficial posterior compartment?
plantarflexion, tibial N, posterior tibial A
General action, innervation and blood supply to deep posterior compartment of leg?
flexion of digits, tibial N, posterior tibial and peroneal A
Muscles of the anterior compartment of leg
Tibialis anterior, EDL, EHL, extensor hallucis capsularis, peroneus tertius
Origin and insertion of tibialis anterior
O: lateral condyle/lateral surface of tibia, IO membrane
I: medial plantar border of medial cuneiform and base of MT1
Action and innervation of tibialis anterior
A-dorsiflex ankle, invert ankle, supination of intertarsal joints
N- deep peroneal N
Origin and insertion of EDL
O: Lateral condyle of tibia, anterior surface of fibula, IO
I: Extensor expansions of digits 2-5