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Related Concept Videos

Spinal Nerves: Plexus II01:21

Spinal Nerves: Plexus II

1.5K
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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Spinal Nerves: Plexus I01:22

Spinal Nerves: Plexus I

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Nerve plexuses are networks of interlacing nerves that serve as communication hubs to distribute and organize nerve action across various body regions. The nerve plexuses are organized into the cervical plexus located in the neck region, brachial plexus in the shoulder area, lumbar plexus found in the lower back, sacral plexus situated in the pelvis, and coccygeal plexus located in the coccygeal region.
The Cervical Plexus
The cervical plexus, formed by the anterior rami of the first four...
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Related Experiment Video

Updated: Dec 10, 2025

Modified Spared Nerve Injury Surgery Model of Neuropathic Pain in Mice
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Reunification of a split sciatic nerve.

Brendan Huang1, Tess Decater1, Joe Iwanaga1

  • 1Department of Neurosurgery, Tulane Center for Clinical Neurosciences, Tulane University School of Medicine, New Orleans, LA, USA.

Anatomy & Cell Biology
|September 4, 2020
PubMed
Summary
This summary is machine-generated.

A rare sciatic nerve (SN) variation was found where the nerve divided proximally, passed through the piriformis muscle, and reunited distally. This anatomical anomaly presents a unique case not covered by existing classifications.

Keywords:
Anatomic variationAnatomyCadaverSciatic nerve

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Reproducible Mouse Sciatic Nerve Crush and Subsequent Assessment of Regeneration by Whole Mount Muscle Analysis
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Area of Science:

  • Anatomy
  • Morphology
  • Clinical Anatomy

Background:

  • Sciatic nerve (SN) variations can lead to unusual clinical symptoms.
  • Existing classifications may not encompass all observed anatomical anomalies.

Observation:

  • A unique sciatic nerve (SN) variation was identified in an adult male cadaver.
  • The SN exhibited proximal division, with a portion exiting through the piriformis muscle.

Findings:

  • The divided portions of the SN reunited distal to the piriformis muscle.
  • This specific pattern represents a novel anatomical variation.

Implications:

  • Such rare anatomical variations should be documented to expand anatomical knowledge.
  • Understanding these variations is crucial for accurate diagnosis and treatment in clinical practice.