PROSTATIC PLEXUS

 

DESCRIPTION: This is from the inferior part of the inferior hypogastric plexus. Its branches reach the seminal vesicle, prostate, prostatic urethra, ejaculatory ducts, corpora cavernosa, corpus spongiosum, bulbourethral glands and anterior (membranous and spongy) urethra. Its important branches are those which join the pudendal nerve to reach the spongy tissues of the penis- the greater and lesser cavernous nerves. They contain both sympathetic and parasympathetic fibers. Sympathetic fibers (from superior hypogastric plexus) cause vasoconstriction) while parasympathetic (from pelvic splanchnic nerves) cause vasodilation.

BRANCHES:

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To seminal vesicle

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To ductus deferens

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To prostate

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Urethral branches

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Lesser cavernous nerve

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Greater cavernous nerve

FUNCTIONAL COMPONENTS:

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GVE sympathetic vasomotor fibers from roots L1-4.

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GVA sympathetic sensory fibers whose cell bodies are placed in the L1-4 spinal ganglia through the thoracic splanchnic nerves and lumbar splanchnic nerves.

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GVE fibers from the parasympathetic sacral outflow S2-S4 called pelvic splanchnic nerves or nervi erigentes

ROOT

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The vasomotor sympathetic fibers originate from the ventral part of the intermediolateral horn of L1-4 spinal cord segments while their sensory branches have their pseudounipolar cell bodies in the spinal ganglia L1-4, and their roots in the dorsal part of the intermediolateral horn of corresponding spinal cord segments.

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 Parasympathetic fibers arise from the ventral aspect of intermediolateral horn of S2-4 spinal cord segments.

 

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Electronic School of Medicine
Creator: Oluwole Ogunranti


 

   

 

 

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Creator: Oluwole Ogunranti