NORMATIVE DATA OF LOWER LIMB NERVE CONDUCTION STUDIES IN HEALTHY ADULT POPULATION OF HARYANA

Abstract

Background: The nerve conduction studies are used to diagnose peripheral neuropathy. Every neurophysiology laboratory needs to have its own
normative data for its population required in clinical practice to identify the abnormalities.
Aims and Objective: The objective of this study was to get normative data of lower limb nerve conduction in asymptomatic, normal individuals of
Haryana population.
Materials and Methods: This study was conducted in randomized selected 120 healthy subjects of both sexes of the general population who were
between the ages of 18 and 70 years using PC based Neurostem-2 machine with silver electrode. Nerve conduction properties were evaluated for
peroneal and tibial for motor nerve conduction and sural for sensory nerve conduction on both sides using standard techniques of supramaximal
percutaneous stimulation with a constant current stimulator and surface recording electrode for both nerves of each subject. Parameters included
are distal motor latency (DML), amplitude, and conduction velocity (CV).
Results: In the right peroneal motor nerve, DML was 3.8 ± 0.33, the amplitude was 5.32±0.45, and the CV was 48.3±2.15. In the left peroneal
nerve, DML was 3.56± 0.53, the amplitude was 5.49±0.50, and the CV was 48.8±2.03. In the right tibial nerve, DML was 4.1± 0.86, the amplitude
was 6.17±0.43, and the CV was 46.95±3.2. In the left tibial nerve, DML was 3.95±0.64, the amplitude was 6.22±0.52, and the CV was 47.2±2.9.
The sural sensory nerve parameters for right side were distal latency 2.83± 0.46, the amplitude- 15.25±4.80, conduction velocity-50.68±3.1 while
for left side were distal latency-2.79±0.52, the amplitude - 16.32±3.56, the conduction velocity -50.8±3.7.
Conclusions: Normative conduction parameter of the lower limb nerves was established for neurophysiology laboratory of SGT Medical College,
Hospital and Research Institute, Gurgaon