Postural Instability in a Young Dyslexic Adult Improved by Hebbian Pulse-width Modulated Lighting

Albert Le Floch; Samuel Henriat; Rosane Fourage; Guy Ropars

doi:doi:10.11648/j.ajim.20200806.15

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Postural Instability in a Young Dyslexic Adult Improved by Hebbian Pulse-width Modulated Lighting

Albert Le Floch, Samuel Henriat, Rosane Fourage, Guy Ropars

Published in American Journal of Internal Medicine (Volume 8, Issue 6)

Received: 14 October 2020 Accepted: 23 October 2020 Published: 4 November 2020

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Abstract

Background: Postural stability is linked to vision in everyone, since when the eyes are closed stability decreases by a factor of 2 or more. However, in persons with dyslexia postural stability is often deficient even when the eyes are open, since they show deficits in motor as well as specific cognitive functions. In dyslexics we have shown that abnormal symmetry between retinal Maxwell’s centroid outlines occurs, perturbing the interhemispheric connections. We have also shown that pulse-width modulated lighting can compensate for this lack of asymmetry, improving the reading skills. Objective: As the postural stability and the vision are correlated, one may wonder if the excess of the postural instability recorded in a young adult with dyslexia can also be reduced by a pulse-width modulated light controlling the Hebbian synaptic plasticity. Method: Using a force platform we compared the postural responses of an observer without dyslexia with the responses of a subject with dyslexia, by measuring their respective standing postures with eyes open looking at a target in a room with either continuous or pulse lighting. Results: There was no effect of changing the lighting conditions on the postural control of the subject without dyslexia. However, we found that the postural stability of the subject with dyslexia which was actually impaired during continuous light, but was greatly improved when a 80 Hz pulsed light frequency was used. Importantly, the excursions of the surface area of the center of pressure on the force platform were reduced by a factor of 2.3. Conclusion: The postural instability in a dyslexic person can be improved by pulse-width modulated lighting.

Published in	American Journal of Internal Medicine (Volume 8, Issue 6)
DOI	10.11648/j.ajim.20200806.15
Page(s)	267-273
Creative Commons	This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.
Copyright	Copyright © The Author(s), 2020. Published by Science Publishing Group

Keywords

Neural Connectivity, Postural Control, Visual Interactions, Synaptic Plasticity, Dyslexia, Pulse Light Effect

References

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APA Style

Albert Le Floch, Samuel Henriat, Rosane Fourage, Guy Ropars. (2020). Postural Instability in a Young Dyslexic Adult Improved by Hebbian Pulse-width Modulated Lighting. American Journal of Internal Medicine, 8(6), 267-273. https://doi.org/10.11648/j.ajim.20200806.15

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ACS Style

Albert Le Floch; Samuel Henriat; Rosane Fourage; Guy Ropars. Postural Instability in a Young Dyslexic Adult Improved by Hebbian Pulse-width Modulated Lighting. Am. J. Intern. Med. 2020, 8(6), 267-273. doi: 10.11648/j.ajim.20200806.15

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Albert Le Floch, Samuel Henriat, Rosane Fourage, Guy Ropars. Postural Instability in a Young Dyslexic Adult Improved by Hebbian Pulse-width Modulated Lighting. Am J Intern Med. 2020;8(6):267-273. doi: 10.11648/j.ajim.20200806.15

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@article{10.11648/j.ajim.20200806.15,
  author = {Albert Le Floch and Samuel Henriat and Rosane Fourage and Guy Ropars},
  title = {Postural Instability in a Young Dyslexic Adult Improved by Hebbian Pulse-width Modulated Lighting},
  journal = {American Journal of Internal Medicine},
  volume = {8},
  number = {6},
  pages = {267-273},
  doi = {10.11648/j.ajim.20200806.15},
  url = {https://doi.org/10.11648/j.ajim.20200806.15},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ajim.20200806.15},
  abstract = {Background: Postural stability is linked to vision in everyone, since when the eyes are closed stability decreases by a factor of 2 or more. However, in persons with dyslexia postural stability is often deficient even when the eyes are open, since they show deficits in motor as well as specific cognitive functions. In dyslexics we have shown that abnormal symmetry between retinal Maxwell’s centroid outlines occurs, perturbing the interhemispheric connections. We have also shown that pulse-width modulated lighting can compensate for this lack of asymmetry, improving the reading skills. Objective: As the postural stability and the vision are correlated, one may wonder if the excess of the postural instability recorded in a young adult with dyslexia can also be reduced by a pulse-width modulated light controlling the Hebbian synaptic plasticity. Method: Using a force platform we compared the postural responses of an observer without dyslexia with the responses of a subject with dyslexia, by measuring their respective standing postures with eyes open looking at a target in a room with either continuous or pulse lighting. Results: There was no effect of changing the lighting conditions on the postural control of the subject without dyslexia. However, we found that the postural stability of the subject with dyslexia which was actually impaired during continuous light, but was greatly improved when a 80 Hz pulsed light frequency was used. Importantly, the excursions of the surface area of the center of pressure on the force platform were reduced by a factor of 2.3. Conclusion: The postural instability in a dyslexic person can be improved by pulse-width modulated lighting.},
 year = {2020}
}

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TY  - JOUR
T1  - Postural Instability in a Young Dyslexic Adult Improved by Hebbian Pulse-width Modulated Lighting
AU  - Albert Le Floch
AU  - Samuel Henriat
AU  - Rosane Fourage
AU  - Guy Ropars
Y1  - 2020/11/04
PY  - 2020
N1  - https://doi.org/10.11648/j.ajim.20200806.15
DO  - 10.11648/j.ajim.20200806.15
T2  - American Journal of Internal Medicine
JF  - American Journal of Internal Medicine
JO  - American Journal of Internal Medicine
SP  - 267
EP  - 273
PB  - Science Publishing Group
SN  - 2330-4324
UR  - https://doi.org/10.11648/j.ajim.20200806.15
AB  - Background: Postural stability is linked to vision in everyone, since when the eyes are closed stability decreases by a factor of 2 or more. However, in persons with dyslexia postural stability is often deficient even when the eyes are open, since they show deficits in motor as well as specific cognitive functions. In dyslexics we have shown that abnormal symmetry between retinal Maxwell’s centroid outlines occurs, perturbing the interhemispheric connections. We have also shown that pulse-width modulated lighting can compensate for this lack of asymmetry, improving the reading skills. Objective: As the postural stability and the vision are correlated, one may wonder if the excess of the postural instability recorded in a young adult with dyslexia can also be reduced by a pulse-width modulated light controlling the Hebbian synaptic plasticity. Method: Using a force platform we compared the postural responses of an observer without dyslexia with the responses of a subject with dyslexia, by measuring their respective standing postures with eyes open looking at a target in a room with either continuous or pulse lighting. Results: There was no effect of changing the lighting conditions on the postural control of the subject without dyslexia. However, we found that the postural stability of the subject with dyslexia which was actually impaired during continuous light, but was greatly improved when a 80 Hz pulsed light frequency was used. Importantly, the excursions of the surface area of the center of pressure on the force platform were reduced by a factor of 2.3. Conclusion: The postural instability in a dyslexic person can be improved by pulse-width modulated lighting.
VL  - 8
IS  - 6
ER  -

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Author Information

Albert Le Floch

Laser Physics Laboratory, University of Rennes 1, Rennes, France
Samuel Henriat

Clinic of Podiatry, Pontivy, France
Rosane Fourage

Institute of Training in Podology, Ergotherapy and Kinesitherapy, Rennes, France
Guy Ropars

Laser Physics Laboratory, University of Rennes 1, Rennes, France

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Albert Le Floch, Samuel Henriat, Rosane Fourage, Guy Ropars. (2020). Postural Instability in a Young Dyslexic Adult Improved by Hebbian Pulse-width Modulated Lighting. American Journal of Internal Medicine, 8(6), 267-273. https://doi.org/10.11648/j.ajim.20200806.15

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ACS Style

Albert Le Floch; Samuel Henriat; Rosane Fourage; Guy Ropars. Postural Instability in a Young Dyslexic Adult Improved by Hebbian Pulse-width Modulated Lighting. Am. J. Intern. Med. 2020, 8(6), 267-273. doi: 10.11648/j.ajim.20200806.15

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AMA Style

Albert Le Floch, Samuel Henriat, Rosane Fourage, Guy Ropars. Postural Instability in a Young Dyslexic Adult Improved by Hebbian Pulse-width Modulated Lighting. Am J Intern Med. 2020;8(6):267-273. doi: 10.11648/j.ajim.20200806.15

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@article{10.11648/j.ajim.20200806.15,
  author = {Albert Le Floch and Samuel Henriat and Rosane Fourage and Guy Ropars},
  title = {Postural Instability in a Young Dyslexic Adult Improved by Hebbian Pulse-width Modulated Lighting},
  journal = {American Journal of Internal Medicine},
  volume = {8},
  number = {6},
  pages = {267-273},
  doi = {10.11648/j.ajim.20200806.15},
  url = {https://doi.org/10.11648/j.ajim.20200806.15},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ajim.20200806.15},
  abstract = {Background: Postural stability is linked to vision in everyone, since when the eyes are closed stability decreases by a factor of 2 or more. However, in persons with dyslexia postural stability is often deficient even when the eyes are open, since they show deficits in motor as well as specific cognitive functions. In dyslexics we have shown that abnormal symmetry between retinal Maxwell’s centroid outlines occurs, perturbing the interhemispheric connections. We have also shown that pulse-width modulated lighting can compensate for this lack of asymmetry, improving the reading skills. Objective: As the postural stability and the vision are correlated, one may wonder if the excess of the postural instability recorded in a young adult with dyslexia can also be reduced by a pulse-width modulated light controlling the Hebbian synaptic plasticity. Method: Using a force platform we compared the postural responses of an observer without dyslexia with the responses of a subject with dyslexia, by measuring their respective standing postures with eyes open looking at a target in a room with either continuous or pulse lighting. Results: There was no effect of changing the lighting conditions on the postural control of the subject without dyslexia. However, we found that the postural stability of the subject with dyslexia which was actually impaired during continuous light, but was greatly improved when a 80 Hz pulsed light frequency was used. Importantly, the excursions of the surface area of the center of pressure on the force platform were reduced by a factor of 2.3. Conclusion: The postural instability in a dyslexic person can be improved by pulse-width modulated lighting.},
 year = {2020}
}

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TY  - JOUR
T1  - Postural Instability in a Young Dyslexic Adult Improved by Hebbian Pulse-width Modulated Lighting
AU  - Albert Le Floch
AU  - Samuel Henriat
AU  - Rosane Fourage
AU  - Guy Ropars
Y1  - 2020/11/04
PY  - 2020
N1  - https://doi.org/10.11648/j.ajim.20200806.15
DO  - 10.11648/j.ajim.20200806.15
T2  - American Journal of Internal Medicine
JF  - American Journal of Internal Medicine
JO  - American Journal of Internal Medicine
SP  - 267
EP  - 273
PB  - Science Publishing Group
SN  - 2330-4324
UR  - https://doi.org/10.11648/j.ajim.20200806.15
AB  - Background: Postural stability is linked to vision in everyone, since when the eyes are closed stability decreases by a factor of 2 or more. However, in persons with dyslexia postural stability is often deficient even when the eyes are open, since they show deficits in motor as well as specific cognitive functions. In dyslexics we have shown that abnormal symmetry between retinal Maxwell’s centroid outlines occurs, perturbing the interhemispheric connections. We have also shown that pulse-width modulated lighting can compensate for this lack of asymmetry, improving the reading skills. Objective: As the postural stability and the vision are correlated, one may wonder if the excess of the postural instability recorded in a young adult with dyslexia can also be reduced by a pulse-width modulated light controlling the Hebbian synaptic plasticity. Method: Using a force platform we compared the postural responses of an observer without dyslexia with the responses of a subject with dyslexia, by measuring their respective standing postures with eyes open looking at a target in a room with either continuous or pulse lighting. Results: There was no effect of changing the lighting conditions on the postural control of the subject without dyslexia. However, we found that the postural stability of the subject with dyslexia which was actually impaired during continuous light, but was greatly improved when a 80 Hz pulsed light frequency was used. Importantly, the excursions of the surface area of the center of pressure on the force platform were reduced by a factor of 2.3. Conclusion: The postural instability in a dyslexic person can be improved by pulse-width modulated lighting.
VL  - 8
IS  - 6
ER  -

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