Nerves of the Pelvis Flashcards
Iliohypogastric nerve
L1–sensory to skin over lowest dermatome of anterior body wall
ilioinguinal nerve
la–sensory to labial/scrotal region
genitofemoral nerve
L1,L2–skin of proximal thigh and labial/scrotal region
lateral femoral cutaneous nerve
L2,L3–skin over the lateral aspect of the thigh
femoral nerve
L2, L3, L4–skin of anterior thigh and muscles of anterior compartment of thigh
obturator nerve
L2, L3, L4– skin of medial thigh and muscles of medial compartment of thigh
lumbosacral trunk
L4, L5–takes lumbar innervation to sacral plexus
sciatic nerve
L4-S3–motor/sensory to posterior compartment of thigh and all of leg and foot
pudendal nerve
S2, S3, S4– sensory to perineum and external genitalia
which nerves are concerned with innervating the muscular floor of the pelvis?
those arising from S2-S4 (NOT the pelvic splanchnic portions of these vertebral levels but the somatomotor portions
how is parasympathetic innervation distributed within the pelvis?
S2-S4 via the pelvic splanchnic nerves
where does the sympathetic innervation come from?
the sympathetic trunk
via what structure does the sympathetic innervation arrive to the sympathetic trunk?
the lumbar and sacral splanchnic nerves (NOT pelvic splanchnic)
what 2 plexuses are concerned with pelvic autonomic distribution?
superior and inferior hypogastric plexuses
