Pelvic Vessels and Nerves Flashcards
What are the nerve roots of the sciatic nerve?
L4,5 S1-3
What does the sciatic nerve supply?
- Posterior compartment of thigh
- All muscles in the leg and foot
What are the gluteal nerves?
- Superior gluteal
- Inferior gluteal
What are the nerve roots of the superior gluteal nerve?
L4,5 S1
What does the superior gluteal nerve supply?
Gluteus medius and minimus
What are the nerve roots of the inferior gluteal nerve?
L5 S1,2
What does the inferior gluteal nerve supply?
Gluteus maximus
What are the nerve roots of the nerve to obturator internus?
Direct L5-S1
What are the nerve roots of the nerve to piriformis?
Direct from S1,2
What are the nerve roots of the nerve to levator ani?
Direct S4 and Pudendal
What are the nerve roots of the nerve to the coccygeus?
Direct S4,5
What are the nerve roots of the pudendal nerve?
S2-4
What does the pudendal nerve supply with innervation?
- Levator ani
- External anal sphincter
- External urethral sphincter
- Bulbospongiosus
- Ischiocavernosus
What type of innervation does the pudendal nerve give?
- Motor
- Sensory
What type of innervation do the inferior and superior hypogastric plexuses give?
Autonomic
What function does sympathetic innervation have in the pelvis?
- Decrease rectum movement
- Contract internal anal and urethral sphincters
- Relax bladder detrusor
- Contract ductus deferens and seminal vesicles
- Relax and contract uterus
- Vasoconstriction
What is the function of parasympathetic innervation in the pelvis?
- Motility of rectum and anal canal
- Relax internal anal sphincter
- Contracts detrusor
- Vasodilation of arteries
What are the nerve roots of the parasympathetic innervation in the pelvis?
Pelvic splanchnic nerves S2-4
What level does the aorta divide into 2 common iliac arteries?
L4
What do the common iliac arteries divide into?
- Internal iliac branch
- External iliac branch
What branch supplies blood to the pelvis?
Internal iliac branch
How many divisions does the internal iliac artery have?
2
- Anterior
- Posterior
What are the branches of the anterior division of the internal iliac artery in males?
- Inferior vesical
- Middle rectal
What does the anterior division of the internal iliac artery supply in males?
- Prostate
- Seminal vesicles
- Ductus deferens
What are the branches of the anterior division of the internal iliac artery in females?
- Uterine
- Vaginal
What are the branches of the posterior division of the internal iliac artery?
- Iliolumbar
- Lateral sacral
- Superior gluteal
