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Establishing normal nerve conduction values- lumbrical and interosseous responses.

Brian S Foley1, Ralph M Buschbacher

  • 1Department of Physical Medicine and Rehabilitation, Indiana University School of Medicine, Indianapolis, IN, USA.

Journal of Long-Term Effects of Medical Implants
|January 9, 2007
PubMed
Summary

This study establishes a comprehensive normative database for first and second lumbrical nerve responses, crucial for accurate diagnosis in median and ulnar nerve conditions. Findings provide reliable reference values for clinical electrodiagnostic testing.

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Area of Science:

  • Neuroscience
  • Clinical Electrophysiology
  • Peripheral Nerve Research

Background:

  • Advances in surgical techniques necessitate updated normative data for peripheral nerves.
  • Existing literature lacks sufficient sample size and rigor for reliable interpretation of normal values.
  • Median and ulnar nerves are frequently impacted, requiring precise normative data.

Purpose of the Study:

  • To establish a large normative database for first and second lumbrical nerve conduction studies.
  • To investigate differences between second lumbrical and interosseous responses.
  • To provide reliable reference values for clinical electrodiagnostic assessments.

Main Methods:

  • Recruited 196 asymptomatic subjects without neuropathy risk factors.
  • Performed nerve stimulations with recordings at first lumbrical, second lumbrical, and interosseous muscles.
  • Collected normative data on latency and amplitude for these muscles.

Main Results:

  • Established mean latencies for first lumbrical (3.6 ± 0.4 ms) and second lumbrical (3.7 ± 0.4 ms).
  • Determined mean amplitudes for second lumbrical (3.0 ± 2.0 mV) and interosseous muscles (6.9 ± 2.3 mV).
  • Quantified latency differences between lumbrical and interosseous responses, providing upper limits of normal.

Conclusions:

  • Presents a substantial normative database for first and second lumbrical nerve conduction studies.
  • Offers valuable data for the second interosseous muscle, aiding in electrodiagnostic interpretations.
  • Supports accurate diagnosis and management of peripheral nerve conditions affecting the median and ulnar nerves.