Pelvic nerves and vessels Flashcards
(30 cards)
What are the 2 main nerves arising from the sacral plexus?
Sciatic and Pudendal
Root value of Sciatic nerve?
L4 - S3
Root value of Pudendal nerve?
S2 - S4
Where do the sacral plexus nerves leave through?
Greater sciatic foramen
Where does the Sciatic nerve pass through?
Greater sciatic foramen
Where does the sciatic nerve enter after passing through a structure?
Gluteal region
Where does the sciatic nerve descend along?
Posterior aspect of the thigh to supply the posterior aspect of the thigh, leg and foot
What is the root value of the superior gluteal nerve?
L4, L5 and S1
What does the superior gluteal nerve supply?
Gluteis medius and minimus
What is the root value of the inferior gluteal nerve?
L5, S1 and S2
What does the inferior gluteal nerve supply?
Gluteus maximus
What is the root value of Obturator internus?
L5-S1
What is the root value of Piriformis?
S1 - S2
What is the direct root of the levator ani?
S4
What is the direct root of Coccygeus?
S4 and S5
What does the pudendal nerve supply?
Levator ani, external anal sphincter and external urethral sphincters, bulbospongiosus and ischiocavernosus
What type of innervation is pudendal?
Motor and sensory
Where does the pudendal nerve leave?
Through the greater sciatic notch between piriformis and coccyges muscles
What does the pudendal nerve hook around?
The ischial spine
Where does the pudendal nerve enter the perineum?
Through the lesser sciatic notch
What are the autonomic nerve plexus?
Superior and inferior hypogastric plexus
What contracts for ejaculation?
Ductus deferens and seminal vesicle
What root value does the aorta divide into common iliac arteries?
L4
What are the branches of the common iliac arteries?
Internal and external iliac branches
