biology

Superior hypogastric plexus

Superior hypogastric plexus is a biology topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Superior hypogastric plexus rather than just read about it. In short: The superior hypogastric plexus (in older texts, hypogastric plexus or presacral nerve) is a plexus of nerves situated on the vertebral bodies anterior to the bifurcation of the abdominal aorta. It bifurcates to form the left and the right hypogastric nerve.

Key takeaways

Superior hypogastric plexus belongs to biology; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Superior hypogastric plexus to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Superior hypogastric plexus from memory before moving on to harder problems.

Reference excerpt

The superior hypogastric plexus (in older texts, hypogastric plexus or presacral nerve) is a plexus of nerves situated on the vertebral bodies anterior to the bifurcation of the abdominal aorta. It bifurcates to form the left and the right hypogastric nerve. The SHP is the continuation of the abdominal aortic plexus.

Structure

Afferents The superior hypogastric plexus receives contributions from the two lower lumbar splanchnic nerves (L1-L2), which are branches of the chain ganglia. They also contain parasympathetic fibers which arise from pelvic splanchnic nerve (S2-S4) and ascend from inferior hypogastric plexus; it is more usual for these parasympathetic fibers to ascend to the left-handed side of the superior hypogastric plexus and cross the branches of the sigmoid and left colic vessel branches, as these parasympathetic branches are distributed along the branches of the inferior mesenteric artery.

Efferents From the plexus, sympathetic fibers are carried into the pelvis as two main trunks - the right and left hypogastric nerves - each lying medial to the internal iliac artery and its branches. The right and left hypogastric nerves continues as inferior hypogastric plexus; these hypogastric nerves send sympathetic fibers to the ovarian and ureteric plexuses, which originate within the renal and abdominal aortic sympathetic plexuses.

Relations The superior hypogastric plexus is often displaced somewhat to the left of the midline. It is situated between the common iliac arteries. It is anterior to the lumbar vertebra L5 and sacral promontory, the aortic bifurcation, and left common iliac vein. It is posterior to the parietal peritoneum (with avascular areolar tissue intervening between these two structures). It is situated near the apex of the attachment of the sigmoid mesocolon.

Clinical significance Presacral neurectomy is a laparoscopic procedure where superior hypogastric plexus is excised, so that the pain pathway is cut off from the spinal column. This procedure is done to manage chronic pelvic pain when conservative medical therapy fails.

Additional images

References

This article incorporates text in the public domain from page 987 of the 20th edition of Gray's Anatomy (1918)

External links Autonomics of the Pelvis - Page 4 of 12 anatomy module at med.umich.edu posteriorabdomen at The Anatomy Lesson by Wesley Norman (Georgetown University) (posteriorabdmus&nerves) pelvis at The Anatomy Lesson by Wesley Norman (Georgetown University) (pelvicsympathnerves) figures/chapter_32/32-6.HTM: Basic Human Anatomy at Dartmouth Medical School

Illustrations

Worked examples

Example 1 — a first encounter with Superior hypogastric plexus

Start with the simplest possible case. Write down what Superior hypogastric plexus claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In biology, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Superior hypogastric plexus before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Superior hypogastric plexus ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Superior hypogastric plexus

In research: Superior hypogastric plexus appears in biology research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Superior hypogastric plexus in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Superior hypogastric plexus is common in secondary-school and first-year university syllabi. It links to neighbouring topics Nerve plexus, Nerves of the torso, Neuroanatomy stubs, so understanding it makes those chapters shorter.
In everyday life: Look for Superior hypogastric plexus outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Superior hypogastric plexus in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Superior hypogastric plexus means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Superior hypogastric plexus out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Superior hypogastric plexus in simple terms?

Why does Superior hypogastric plexus matter?

Because it connects several biology ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Superior hypogastric plexus?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Superior hypogastric plexus.