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Spinal Nerves: Plexus I01:22

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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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Related Experiment Video

Updated: May 29, 2026

Screening of Axonal Degeneration in Carpal Tunnel Syndrome Using Ultrasonography and Nerve Conduction Studies
06:40

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

Published on: January 11, 2019

Reference data for ulnar nerve short segment conduction studies at the elbow.

Murat Korkmaz1, Arzu Yağiz On, Funda Atamaz Caliş

  • 1Department of Physical Medicine and Rehabilitation, Ege University Medical Faculty, Bornova, 35100 İzmir, Turkey.

Muscle & Nerve
|September 29, 2011
PubMed
Summary

This study establishes reference data for ulnar nerve short segment conduction studies (SSCSs) at 2-cm intervals. Findings indicate that body mass index (BMI) influences SSCS results, necessitating its consideration during interpretation.

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Area of Science:

  • Neuroscience
  • Clinical Electrophysiology

Background:

  • Ulnar nerve short segment conduction studies (SSCSs) require standardized reference data.
  • Current data may not adequately cover specific 2-cm intervals for precise ulnar nerve assessment.

Purpose of the Study:

  • To generate normative reference data for ulnar nerve SSCSs across 2-cm segments.
  • To investigate the influence of demographic and anthropometric factors on ulnar nerve SSCS parameters.

Main Methods:

  • Collected ulnar nerve SSCS data from 200 healthy volunteers across dominant and non-dominant arms.
  • Analyzed the impact of age, gender, weight, height, and BMI on SSCS measurements.
  • Examined conduction velocities and amplitude changes over 2-cm segments.

Main Results:

  • Established high percentile values for short segment latency changes (0.4–0.7 ms).
  • Identified slower ulnar nerve conductions in segments immediately below and above the elbow.
  • Observed no significant impact of age or gender; faster conductions correlated with increased BMI.

Conclusions:

  • Reference values for ulnar nerve SSCSs should be segment-specific (2-cm intervals).
  • Body mass index (BMI) is a significant factor influencing SSCS interpretation and should be accounted for.