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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.
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The radius is longer of the two bones that make up the human antebrachium or forearm. At the proximal end, the radius articulates with the capitulum of the humerus and the radial notch of the ulna to form the elbow joint. At the distal end, the radius articulates with the ulna via the ulnar notch, forming the distal radioulnar joint. Distally, the radius also attaches to the carpal wrist bones (scaphoid and lunate) to form the radiocarpal joint.
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Related Experiment Video

Updated: Sep 22, 2025

Screening of Axonal Degeneration in Carpal Tunnel Syndrome Using Ultrasonography and Nerve Conduction Studies

Screening of Axonal Degeneration in Carpal Tunnel Syndrome Using Ultrasonography and Nerve Conduction Studies

Published on: January 11, 2019

Nerve Imaging in the Wrist.

Steven P Daniels¹, Jadie E De Tolla², Ali Azad²

¹Department of Radiology, New York University Grossman School of Medicine, New York University, New York, New York.

Seminars in Musculoskeletal Radiology

|May 24, 2022

Summary

This summary is machine-generated.

Wrist neuropathic symptoms have diverse causes. Imaging, including ultrasonography and MRI, is crucial for diagnosing nerve lesions, differentiating wrist issues from proximal conditions, and guiding surgical plans.

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Published on: October 7, 2021

Area of Science:

Neurology
Radiology
Anatomy

Background:

Neuropathic symptoms in the wrist are common and multifactorial.
Accurate diagnosis is essential for effective treatment and surgical planning.
Distinguishing wrist nerve lesions from proximal causes is clinically significant.

Purpose of the Study:

To review the role of imaging in diagnosing wrist neuropathies.
To correlate imaging findings with specific nerve pathologies.
To provide a comprehensive overview of nerve anatomy and pathology in the wrist.

Main Methods:

Review of nerve anatomy relevant to the wrist.
Analysis of normal and abnormal findings on ultrasonography (US) and magnetic resonance imaging (MRI).
Discussion of common and uncommon etiologies of wrist neuropathy.

Main Results:

Imaging, particularly US and MRI, is vital for localizing nerve lesions in the wrist.
Imaging differentiates distal wrist neuropathies from proximal conditions like cervical radiculopathy or brachial plexopathy.
Specific imaging features correlate with various nerve pathologies, aiding diagnosis.

Conclusions:

Ultrasonography and MRI are indispensable tools for evaluating wrist neuropathies.
Imaging complements electrodiagnostic studies by providing anatomical detail for lesion site confirmation and surgical guidance.
A thorough understanding of nerve anatomy and imaging findings is key to managing wrist neuropathies.