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. 2017 Apr-Jun;20(2):127-131.
doi: 10.4103/0972-2327.194313.

Dorsal Sural Sensory Nerve Action Potential: A Study for Reference Values

Sweta Chetan Chaudhari  1 , Khushnuma Anil Mansukhani  1 , Alika Sharma  1 , Lajita Balakrishnan  1 , Aarthika Sreenivasan  1
Affiliations

Dorsal Sural Sensory Nerve Action Potential: A Study for Reference Values

Sweta Chetan Chaudhari et al. Ann Indian Acad Neurol. 2017 Apr-Jun.

Abstract

Background: Dorsal sural sensory nerve action potential (SNAP) could help diagnose early or subclinical peripheral neuropathy.

Objectives: To establish reference data for dorsal sural SNAP amplitude, latency, and velocity in healthy participants.

Materials and methods: A prospective study was conducted in 45 nerves from healthy participants between 18 and 90 years and stratified into three age groups (a = 18-40 years, b = 41-60 years, and c>60 years). StataCorp 12.2 statistical program was used for all statistical analyses. Mean-2 standard deviation was used to generate reference values for the lower limit of amplitude and velocity in each age group. ANOVA with Bonferroni correction was used for intergroup comparisons of amplitude and velocity. Regression analysis was used to compute an equation for the predicted amplitude with age, height, and weight as the covariates.

Results: The lower limit for amplitude (uv) in Groups a, b, and c was 2.57, 1.97, and 1.01, respectively. The lower limit for velocity (m/s) was 33.6, 32, and 22.8, respectively. Statistical significance was noted between the amplitudes of participants in Groups b and c (P = 0.039) and a and c (P = 0.001). Similarly, velocity was significantly different between Groups b and c (P = 0.04) and a and c (P = 0.008). Age was the covariate with maximum effect on the dorsal sural amplitude. Gender and side-to-side comparison did not show statistical significance for amplitude and velocity measurements. Linear regression analysis of the transformed amplitude gave the predictive equation as (y) =3.338 + age (-0.0167) + height in meters (-0.209) + weight (0.001).

Conclusion: This study provides reference data for dorsal sural SNAP in Indian population stratified by age.

Keywords: Dorsal sural; Indian; reference values; sensory nerve action potential.

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Conflict of interest statement

There are no conflicts of interest.

Figures

Figure 1
Figure 1
Placement of recording and stimulating electrodes for recording the dorsal sural sensory nerve action potential antidromically
Figure 2
Figure 2
Dorsal sural sensory nerve action potential in a 78-year-old participant
See this image and copyright information in PMC

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