NORMATIVE DATA OF NERVE CONDUCTION STUDY OF UPPER LIMB NERVES AMONG ADULTS IN SULAIMANI PROVINCE: A CROSS-SECTIONAL STUDY

Volume 12 ,Issue 4 ,December 2022 ,Pages 371-384

Authors

Hiwa S. Namiq 1 ; Talar Hamaali 2

1 Dep. of Pharmacology, College of Pharmacy, University of Sulaimani, Kurdistan Region, Iraq.

2 Department of Physiology, College of Medicine, University of Sulaimani, Kurdistan Region, Iraq.

DOI logo 10.17656/jsmc.10381

Keywords

Abstract

Background
Electrodiagnostic studies, which serve as an extension of clinical examination, play an important role in
evaluating patients with neuromuscular disorders. Therefore, each electromyography laboratory must have
normative data for its population to establish reference values for nerve conduction study (NCS) parameters,
and many carefully screened healthy subjects are required.
Objectives
To provide the normative data for a nerve conduction study among adults in Sulaimani province. And evaluate
the impact of age, gender, and anthropometric measures on NCS parameters.
Patients and Methods
A cross-sectional study was conducted at the electromyography unit of Shahid Dr. Aso Hospital in Sulaimani,
Iraq. The study involved 300 healthy participants with an approximately equal proportion of the two genders.
Their age ranged from 20 to 60 years. The subjects were enrolled in the study according to specific inclusion
criteria after history checking and undergoing neurological examination.
Results
The study included 144 (48%) male and 156 (52%) female participants. The DMLs and DSLs of all the tested
nerves turned out to be significantly shorter in females. CMAP-As and SNAP-As were considerably higher
in females. The MCVs and SCVs of all nerves were markedly faster in females. Also, the median and ulnar
FMINLAT results showed to be significantly shorter in females. Aging has led to a significant prolongation of
median DML and DSL, reduction in CMAP-A and SNAP-A, and slowing of MCV and SCV. Similar results
were obtained for ulnar and radial nerves with different levels of statistical significance. Using Pearson’s
correlation, the DML, DSL, and FMINLATs of all the tested nerves showed a significant positive linear
correlation with height.
Conclusion
Age and BMI did not show a systematic pattern of influence on any of the NCS parameters, demonstrating
variable effects with variable levels of significance. In NCS, applying universally standardized techniques
may result in different NCS data to the existing literature regarding latencies, amplitudes, nerve conduction
velocities, and F-wave data.

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  • Published at21 December 2022

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