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Changes in visual evoked potentials after phosphene electrostimulation in children suffering from myopia

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Neurophysiology Aims and scope

We recorded visual evoked potentials (VEPs) in children suffering from medium and high myopia (3.0 to 6.0 and more than 6.0 D; 28 and 21 patients, respectively); a light flash was used as the stimulus. The VEPs were recorded before and after a curative course of phosphene electrostimulation (PhES; frequency 15 sec−1, 10 to 15 10-min-long everyday sessions). The above course resulted in clear trends toward decreases in the peak latencies of the P60 and P100 VEP components; changes in the latencies of other components were expressed to a lesser extent. In children with medium myopia, the latency of the P60 component decreased, on average, by more than 21% (P < 0.05); in patients with high myopia, the respective decrease was about 12% (P > 0.05). These shifts were accompanied by increases in the mean amplitudes of the P60 and, to a lesser degree, P100 (more expressed in medium myopia). The data obtained allow us to suppose that the PhES course provides increases in the transmission velocity through relay structures of the visual analyzer and in neuronal networks of the visual cortex and also in the number of neuronal units whose activity is reflected in generation of VEPs. Application of the PhES technique is much more effective in relatively moderate myopia.

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Authors and Affiliations

  1. Ushinskii South-Ukrainian Pedagogical University, Odessa, Ukraine

    T. V. Degtyarenko

  2. Filatov Institute of Ophthalmic Diseases and Tissue Therapy, Academy of Medical Sciences of Ukraine, Odessa, Ukraine

    I. M. Boichouk & A. G. Chaura

Authors
  1. T. V. Degtyarenko
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  2. I. M. Boichouk
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  3. A. G. Chaura
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Corresponding author

Correspondence to A. G. Chaura.

Additional information

Neirofiziologiya/Neurophysiology, Vol. 40, No. 3, pp. 228–235, May–June, 2008.

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Degtyarenko, T.V., Boichouk, I.M. & Chaura, A.G. Changes in visual evoked potentials after phosphene electrostimulation in children suffering from myopia. Neurophysiology 40, 193–198 (2008). https://doi.org/10.1007/s11062-008-9032-5

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  • DOI: https://doi.org/10.1007/s11062-008-9032-5

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