Flashcards in Sacral plexus Deck (16):
What is the course of travel of superior gluteal nerve?
leaves pelvis via greater sciatic and enters gluteal region superior to the piriformis along with superior gluteal artery and superior gluteal vein
What are the nerve roots of the inferior gluteal nerve and what does it innervate?
L5, S1, S2
innervates gluteus maximus
enters gluteal region inferior to piriformis along with inferior gluteal artery & vein
What is the nerve roots of the sciatic nerve and what does it split into?
splits into common fibular and tibial nerves
What are the nerve roots of the common fibular nerve and what muscles does it innervate?
L5, S1, S2
MOTOR: muscles in anterior leg (L4, L5) through deep fibular nerve: fibularis tertius, extensor digitorum & hallucis longus, tibialis anterior
Lateral leg (L5, S1, S2) through superficial fibular nerve: fibularis longus & brevis, short head of biceps femoris
What does superior gluteal nerve innervate and what are it's nerve roots?
L4, L5, S1
innervates gluteus medius, gluteus minimus and tensor fasciae latae
Which sensory region does the common fibular nerve innervate? Nerve roots?
SENSORY: lateral leg through lateral sural nerve
dorsum (top) of foot & anterior leg through superficial fibular nerve
webbing between hallux & 2nd digit on dorsum of foot through deep fibular nerve
L5, S1, S2
What are the nerve roots of the tibial part of the sciatic nerve and which muscles does it innervate?
L5, S1, S2 posterior thigh & leg muscles
MOTOR: posterior thigh muscles: semitendinosus, semimembranosus, long head of biceps femoris, hamstring of adductor magnus
posterior leg muscles: (L4, L5) tibialis posterior, (L4, L5, S1) popliteus, (S2, S3) flexor hallucis longus, flexor digitorum longus
superficial branch (S1, S2): gastrocneus, soleus, plantaris
What are the nerve roots of nerve to quadratus femoris and what does it innervate?
MOTOR: quadratus femoris & gemellus inferior
What are the nerve roots of obturator internus muscle and what does it innervate?
L5, S1 (because also gluteal region but NOT piriformis NOR obturator externus)
MOTOR: obturator internus & gemellus superior
What are the nerve roots of posterior femoral cutaneous nerve and what does it innervate?
S1, S2, S3
SENSORY: skin of posterior thigh (and leg?)
What are the nerve roots of the tibial nerve and what are the sensory innervations?
L5, S1, S2
SENSORY: posteriolateral leg through sural nerve and sole of foot through medial calcaneal, medial plantar and lateral plantar nerve
What is the medial plantar nerve's nerve roots, innervation and which nerve does it branch off from?
S2, S3 from tibial nerve innervating medial plantar foot
MOTOR: abductor hallucis, flexor digitorum brevis, abductor digiti minimi, medial lumbricals, flexor hallucis brevis
What are the nerve roots of the lateral plantar nerve, what does it innervate and which nerve does it branch off from?
S2, S3 from the tibial nerve innervating lateral plantar foot
MOTOR: quadratus plantae, lateral lumbricals, 3 plantar interossei, 4 dorsal interossei
What are the nerve roots of the deep branch of the lateral plantar nerve, which nerve does it branch off from and which muscles does it innervate?
S2, S3 branch from lateral plantar nerve from tibial nerve
MOTOR: ADductor hallucis
What are the nerve roots of the superficial branching lateral plantar nerve, what does it innervate and where does it branch from?
S2, S3 from lateral plantar nerve from tibial nerve
MOTOR: flexor digiti minimi brevis