Pelvic Nerves and Vessels Flashcards by Courtney @Brainscape

Q

Sacral Plexus

A

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Q

Sciatic Nerve

Root value and supply to

A

L4,L5, S1-3

Posterior compartment of thigh and branches supply all the muscles of the leg/foot

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Q

Gluteal Nerves

Superior root value and supply

A

L4,L5,S1

Gluteal to gluteus medius and minimus

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Q

Gluteal Nerves

Inferior root value and supply to

A

L5, S1, S2

Gluteal to gluteus maximus

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Q

Nerve to obturator internus

Root value

A

Direct L5-S1

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Q

Nerve to piriformis

Root value

A

Direct from S1-2

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Q

Levator Ani

Innervation

A

Direct S4 and pudendal

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Q

Coccygeus

Innervation

A

Direct S4, S5

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Q

Pudendal nerve

Root value and supply to

A

S2-S4

Motor and sensory to levator ani, external anal and urethral sphincters, bulbospongosius and ischiocavernosus

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Q

Pudendal nerve route

A

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Q

Mesenteric and Hypogastric Plexuses

A

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Q

Sympathetic innervation to… does what?

Rectum

A

Decreases movement

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Q

Sympathetic innervation to… does what?

Internal anal and urethral sphincters

A

Contract

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Q

Sympathetic innervation to… does what?

Bladder detrusor

A

Relaxed

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Q

Sympathetic innervation during… does what?

Ejaculation

A

Contracts ductus deferens and seminal vesicles

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Q

Sympathetic innervation to… does what?

Uterus

A

Relaxes/contracts (hormonal)

Q

Sympathetic innervation to… does what?

Arteries

A

Vasoconstriction

Q

Parasympathetic innervation to pelvis

Supplied by

A

Pelvic splanchnic nerves S2-4

Q

Parasympathetic innervation to… Does what?

Rectum and anal canal

A

Increases motility

Q

Parasympathetic innervation to… Does what?

Internal anal sphincter

A

Relaxed

Q

Parasympathetic innervation to… Does what?

Bladder

A

Contracts detrusor, inhibits contraction of internal sphincter

Q

Parasympathetic innervation to… Does what?

Seminal vesicles, ductus deferens, uterus

A

Nothing

Q

Parasympathetic innervation to… Does what?

Arteries

A

Vasodilation -> erection

Q

Nerve supply to male perineum

A

Nerve supply to female perineum

Blood supply to pelvis Comes from

Internal iliac arteries, which are brancehs of the common iliac arteries, which branch from the aorta at L4. Each internal iliac artery branches into an anterior and posterior division.

Branches of anterior internal iliac

Anterior internal iliac in males

Anterior internal iliac for females

Posterior internal iliac

Blood supply to pelvic organs

Internal iliac veins