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Spinal Nerves: Plexus II

Spinal Nerves: Plexus II

The plexuses of the lower body include the lumbar, sacral, and coccygeal plexuses, which innervate the abdomen, pelvis, legs, and coccygeal region. These plexuses control the transmission of sensory information and coordinate motor functions of the lower body.
The Lumbar Plexus
The lumbar plexus is situated within the lumbar region of the back and is primarily formed by the first four lumbar spinal nerves (L1 to L4). This plexus extends its branches into several nerves, including the...

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Updated: Nov 11, 2025

Intraoperative Detection of Subtle Endometriosis: A Novel Paradigm for Detection and Treatment of Pelvic Pain Associated with the Loss of Peritoneal Integrity

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Deep infiltrating endometriosis with sacral plexus involvement: Improving knowledge through human cadaver dissection.

Sophie Sanguin¹, Horace Roman², Arthur Foulon¹

¹Department of Gynecology and Obstetrics, Amiens University Medical Center, Amiens, F-80054, France.

Journal of Gynecology Obstetrics and Human Reproduction

|March 30, 2021

Summary

A human cadaver dissection model effectively teaches deep pelvic innervation and its relation to endometriosis. This anatomical training significantly improved residents

Keywords:

Deep infiltrating endometriosis Human cadaver dissection Sacral roots Sciatic nerve

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Area of Science:

Gynecologic surgery
Female pelvic anatomy
Surgical education

Background:

Deep pelvic innervation is crucial for understanding female pelvic conditions like endometriosis.
Existing anatomical knowledge may be insufficient for complex surgical cases.

Purpose of the Study:

To evaluate a human cadaver model for teaching deep pelvic innervation.
To explore the relationship between pelvic innervation and deep infiltrating endometriosis.

Main Methods:

Prospective, observational study involving eight obstetrics and gynecology residents.
Pre- and post-lecture/dissection knowledge assessment.
Standardized cadaver dissection to identify sacral nerves (S2-S4) and pelvic plexuses.

Main Results:

Significant knowledge improvement after lecture (p=0.9.10-5) and dissection (p=0.6.10-6).
Dissection class yielded greater knowledge gains (p=0.0003).
Pelvic nerve structures were identifiable in most cadavers with consistent measurements.

Conclusions:

Human cadaver dissection is valuable for learning deep pelvic innervation.
This model aids in understanding the link between innervation and deep infiltrating endometriosis.
Cadaver dissection can enhance surgical skills through reproducibility and safety.