Branches of the sciatic nerve in the lower leg Flashcards
What are the two branches of the sciatic nerve post the popliteal fossa?
The common fibular (along the biceps femoris) and the tibial nerve deep to the gastrocnemius.
What are the two branches of the tibial nerve based on the group of muscle it supplies on the posterior lower leg?
It has a deep and superficial “branch”.
True or false
The medial sural nerve is a branch of the tibial nerve!
True!
Results may vary, but figures typically depict that the medial sural nerve continues from the tibial nerve.
True or false?
The medial and lateral sural nerve eventually anastomose and form the sural nerve.
True.
What is the terminal branch of the tibial nerve?
The medial calcaneal nerve.
What does the medial calcaneal nerve supply?
The medial surface and sole of the heel.
What does the sural nerve innervate?
The posterolateral leg and the lateral part of the sole.
What are the two branches of the common fibular nerve?
The deep and superficial fibular nerve.
What is the exception of the superficial fibular nerve supply on the foot?
- The web area between the great toe and the second toe (by the deep fibular nerve)
- The lateral side of the little toe (by the sural nerve).
What leg region does the superficial fibular nerve innervate?
The lateral surface.
What leg region does the deep fibular nerve innervate?
The anterior leg compartment.
What is the motoric innervation of the deep fibular nerve?
The anterior compartment muscles (tibialis anterior, extensor hallicis longus, extensor digitorum longus, fibularis tertius).
What is the origin of tibialis anterior?
Lateral aspect of tibia and interosseus membrane.
What is the insertion of tibialis anterior?
Medial and inferior surface of the medial cuneiform and base of metatarsal I.
