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[The lateral root of the ulnar nerve]
1Anatomische Lehrkanzel, Universität Wien, Osterreich.
Acta Anatomica
|January 1, 1989
Summary
A lateral root originating from the lateral fascicle is a normal variation in 56% of brachial plexuses, sometimes forming an 'ulnaris loop' with the median nerve.
Area of Science:
- Anatomy
- Neuroscience
- Surgical Anatomy
Context:
- The brachial plexus is a complex network of nerves crucial for upper limb function.
- Understanding the anatomical variations of the brachial plexus is vital for surgical procedures and neurological diagnosis.
Purpose:
- To investigate the origin of ulnar nerve fibers within the brachial plexus.
- To identify and classify variations in the formation of the ulnar nerve, specifically the presence and characteristics of a lateral root.
Summary:
- This study examined 158 brachial plexuses to determine the origin of ulnar nerve fibers.
- A lateral root, contributing to the ulnar nerve, was identified in 56% of cases.
- These variations, including the 'ulnaris loop,' are considered normal anatomical variations.
Impact:
- This research clarifies normal anatomical variations of the brachial plexus, aiding surgeons and neurologists.
- The findings contribute to a better understanding of nerve pathways and potential injury sites.
- Establishing the term 'ulnaris loop' provides standardized terminology for a specific anatomical variation.