Sacral Plexus Flashcards
Sacral plexus is over
Piriformis
Superior gluteal nerve
Segmental innervation
L4
L5
S1
Superior gluteal nerve exits via
Superior part of greater sciatic notch
Superior gluteal nerve
Motor supply
Gluteus medius and minimus, tensor Fascia Lata
Superior gluteal nerve
Division
Posterior
Inferior gluteal nerve
Segmental innervation
L5
S1
S2
Inferior gluteal nerve exits via
Inferior part of greater sciatic notch
Inferior gluteal nerve
Motor supply
Gluteus Maximus
Inferior gluteal nerve
Division
Posterior
Posterior femoral cutaneous nerve
Segmental innervation
S1
S2
S3
Posterior femoral cutaneous nerve
Cutaneous supply
Distal buttocks
Posterior thigh
Popliteal fossa
Posterior femoral cutaneous nerve
Divisions
Anterior and posterior
Pudendal Nerve
Segmental innervation
S2
S3
S4
Pudendal nerve
Division
Anterior
Pudendal nerve is main
Sensory nerve to external genitalia
S4 only contributes to
Pudendal nerve
Sciatic nerve
Segmental innervation
L4 L5 S1 S2 S3
Sciatic nerve is
Largest nerve in body
Sciatic nerve
Motor supply
Adductor Magnus
Semitendinosus
Semimembranosus
Biceps Femoris
Branches of sciatic nerve
Tibial nerve
Common fibular nerve
Tibial nerve
Division
Anterior
Common fibular nerve
Division
Posterior
Tibial nerve
Supplies
Muscles of posterior leg
Skin of posterior leg and plantar surface of foot
Common fibular nerve
Branches
Superficial fibular nerve
Deep fibular nerve
Superficial fibular nerve
Supplies
Muscles and skin of:
Lateral leg
Anterior leg
Dorsum of foot
Deep fibular nerve
Supplies
Muscles and skin of:
Anterior leg
Lateral leg
Dorsum of foot
