Normal neurophysiologic parameters of the sural nerve among adult healthy Sudanese population

Noury, Ahmed Osman

doi:10.15406/jnsk.2021.11.00446

Cited by 4 publications

References 14 publications

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Normal neurophysiologic parameters of the tibial nerve among adult healthy Sudanese population

Noury

Elmagzoub

Ahmed

et al. 2023

Preprint

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BackgroundNerve conductive studies (NCS) are the most informative portion of the electrodiagnostic evaluation for peripheral neuropathy; NCS can be extremely useful both in localizing lesions and determining the pathological processes. Recently, there is increased interest in quality of normative values for each test result and compare should be done between normal and patients regarding specific disease. So, The aim of our study is to help establish NCS normative data of tibial nerve that could be applicable in the Sudanese population and can be used in neurophysiology departments around the country and to compare with those data published in the literature, and to survey the effects of Age, Gender, Height, Weight and Temperature on Nerve Conduction Study Parameters.MethodsNCSs were performed in 210 tibial nerves of 105 adult healthy Sudanese subjects using standardized techniques.ResultsIt was found that the tibial nerve component values as follows; the distal latency is 4.063±1.0533 m/sec, Proximal latency 13.238 ±1.7253 m/sec, Conduction velocity 48.58±5.634 m/sec, F wave 51.509±6.1013 m/sec, Duration of CMAP at ankle 6.199± 1.0254 m/sec, Amplitude of CMAP at ankle 8.528±3.6658 μV, Area of CMAP at ankle 17.569±7.7389μV/ms, Duration of CMAP at popliteal 7.075±1.3173 m/sec, Amplitude of CMAP at popliteal 6.343±3.2871μV and Area at popliteal 14.914±7.8684 μV/ms.ConclusionThe tibial motor nerve conduction parameters for the tested nerve compared favorably with the existing literature with some discrepancies that were justifiedSignificanceThis is the first study to establish reference values for tibial NCS carried out Sudanese population.

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Normal neurophysiologic parameters of the tibial nerve among adult healthy Sudanese population

Noury

Elmagzoub

Ahmed

et al. 2023

Preprint

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Posterior femoral cutaneous nerve sensory conduction study in a sample of apparently healthy Egyptian volunteers

Saba

2022

Egypt J Neurol Psychiatry Neurosurg

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Background Posterior femoral cutaneous nerve (posterior cutaneous nerve of the thigh) is a sensory nerve arises from the sacral plexus. Its terminal part supplies the skin of the posterior surface of the thigh and popliteal fossa, and it extends for a variable length below the popliteal fossa till the mid-calf region. The aim was to assess the posterior femoral cutaneous nerve antidromic sensory conduction technique and estimate its different sensory nerve action potential parameters’ reference values in a sample of apparently healthy Egyptian participants. One hundred and twenty lower limbs of 60 apparently healthy Egyptian volunteers were included. Clinical evaluation and sensory conduction study for the posterior femoral cutaneous nerve were done. Results Posterior femoral cutaneous nerve sensory nerve action potential was elicited in 98 lower limbs (81.6%) of 52 individuals (86.7%). The obtained results of different parameters of posterior femoral cutaneous nerve sensory nerve action potential were as the following: onset latency (2.04 ± 0.21 ms), peak latency (2.86 ± 0.25 ms), conduction velocity (59.45 ± 6.36 m/s) and amplitude (6.16 ± 2.29 μV). No significant differences between the two genders were found regarding different parameters of posterior femoral cutaneous nerve sensory nerve action potential except for amplitude which was significantly larger among male participants (P = 0.030). No significant differences between the right and left lower limbs were found regarding different parameters of sensory nerve action potential. There was a statistical significant negative correlation between age and posterior femoral cutaneous nerve conduction velocity (P = 0.008). There was a statistical significant positive correlation between height and peak latency (P ≤ 0.0001), as well as, a statistical significant negative correlation between height and conduction velocity (P ≤ 0.0001). There was a statistical significant negative correlation between body mass index and posterior femoral cutaneous nerve peak latency (P = 0.008). Conclusions The research provides a reliable electrophysiological antidromic sensory conduction study for the posterior femoral cutaneous nerve and normal cut-off reference values for posterior femoral cutaneous nerve sensory nerve action potential parameters. This is essential for the evaluation of suspected posterior femoral cutaneous nerve lesions.

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Sural nerve conduction study: Reference values in the Algerian population

Mourad¹,

Athmane²

2022

J Neurosci Neurol Disord

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Objectives: The sural nerve is the most tested sensory nerve in the lower extremities in the electrodiagnostic assessment of peripheral neuropathies. This study presents the reference values of the sural nerve conduction study (NCS) from a significant sample of the Algerian population. Methods: This is a prospective study of right sural NCS in healthy subjects based on the later recommendations of AANEM-NDTF. The nature of the distribution of each electrophysiological parameter was therefore determined. The lower and upper limits were calculated by using the 5th and 95th percentiles respectively and a logarithmic transformation was performed for Sensory Nerve Action Potential (SNAP) amplitude distribution. Results: 115 subjects aged between 20 and 60 years were selected, including 58 women and 57 men. Unlike Sensory Nerve Conduction Velocity (SNCV), the distribution of SNAP amplitude is not Gaussian. The lower limit of SNAP amplitude was 7.70 µV when using the 5th percentile and 6.80 µV by using the Standard Deviation (SD) method after log transformation. Similarly, the lower limit of SNCV was 43 m/s. The SNAP amplitude was greater in women and decreased with age, height and BMI. Conclusion: The values found in this study are comparable to those published in the literature. It may be more appropriate to determine the reference values using percentiles as recently recommended by several authors.

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Normal neurophysiologic parameters of the sural nerve among adult healthy Sudanese population

Cited by 4 publications

References 14 publications

Normal neurophysiologic parameters of the tibial nerve among adult healthy Sudanese population

Normal neurophysiologic parameters of the tibial nerve among adult healthy Sudanese population

Posterior femoral cutaneous nerve sensory conduction study in a sample of apparently healthy Egyptian volunteers

Sural nerve conduction study: Reference values in the Algerian population

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