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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
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Clinical manifestationsPeripheral Arterial Disease (PAD) manifests through a range of symptoms, from the characteristic intermittent claudication to atypical presentations and severe complications in advanced stages. Intermittent claudication, a hallmark symptom of PAD, presents as exercise-induced muscle pain that typically resolves within minutes of rest. This pain is reproducible and stems from inadequate blood flow, leading to the accumulation of lactic acid produced during anaerobic...

Spinal Nerves: Plexus I

Spinal Nerves: Plexus I

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.
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The cervical plexus, formed by the anterior rami of the first four...

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Electrophysiological Methods to Assess Peripheral Pain Block in an Anesthetized Rat

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Published on: November 21, 2025

Electrodiagnostic testing in lumbosacral plexopathies.

Ruple S Laughlin¹, P James B Dyck

¹Department of Neurology, Mayo Clinic Rochester, Rochester, MN 55905, USA. laughlin.ruple@mayo.edu

Physical Medicine and Rehabilitation Clinics of North America

|November 27, 2012

Summary

This summary is machine-generated.

Rigorous electrophysiological evaluation is crucial for lower limb symptoms potentially caused by lumbar or lumbosacral plexopathies. Comprehensive nerve conduction studies and needle examinations, even in unaffected areas, are vital for accurate diagnosis.

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Area of Science:

Neurology
Neurophysiology

Background:

Lower limb symptoms often indicate lumbar or lumbosacral plexus involvement.
Lumbosacral plexopathies can present with subtle, asymmetrical, or widespread pathology.
Accurate diagnosis requires a thorough understanding of plexus anatomy and potential pathologies.

Purpose of the Study:

To outline the anatomy of the lumbar and lumbosacral plexus.
To discuss differential diagnoses for lumbosacral plexopathies.
To present an electrophysiological approach for assessing these conditions.

Main Methods:

Review of lumbar and lumbosacral plexus anatomy.
Discussion of potential causes of plexopathy.
Description of electrophysiological testing strategies, including bilateral and extended nerve conduction studies and needle examinations.

Main Results:

Electrophysiological evaluation is essential for patients with suspected lumbar or lumbosacral plexopathies.
The extent of plexopathy may be underestimated without comprehensive testing.
Thoracic paraspinal and upper limb studies may be necessary.

Conclusions:

A systematic electrophysiological approach is necessary for diagnosing lumbosacral plexopathies.
Comprehensive testing beyond routinely examined areas is often required.
Understanding plexus anatomy and differential diagnoses aids in accurate patient assessment.