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Article

Cortical Contrast Processing in Retinitis Pigmentosa: Evidence of PVEPs Spatial Functions

1
Laboratory of Visual and Cognitive Neuroscience, Institute of Neuroscience, University of Granada, 18016 Granada, Spain
2
Department of Clinical Neurophysiology, San Cecilio University Hospital, 18016 Granada, Spain
3
Department of Physiology, University of Granada, 18016 Granada, Spain
*
Author to whom correspondence should be addressed.
Eur. J. Investig. Health Psychol. Educ. 2020, 10(4), 1010-1019; https://doi.org/10.3390/ejihpe10040071
Received: 29 August 2020 / Revised: 30 September 2020 / Accepted: 12 October 2020 / Published: 16 October 2020
(This article belongs to the Special Issue Research in Clinical and Health Contexts)
Objective: To study the effect of check width size of the stimuli on the amplitude and latency of the P100 component of visual evoked potentials recorded in patients with retinitis pigmentosa (RP). Methods: Pattern reversal visual evoked potentials (PVEPs) were recorded in 16 RP patients and 20 visually normal subjects. Pattern reversal stimuli with five different check widths and 100% of contrast were projected in the right eye of both patients and control subjects. PVEPs induced by stimuli with 78%, 16%, and 6% of contrast were also recorded in 10 of the control subjects. Results: In RP patients, the amplitude of P100 was smaller than controls in all check sized used and the peak P100 amplitude was obtained with a larger check width than in controls. P100 was also delayed in RP patients in all check sizes studied. The P100 amplitude- and latency-check size functions of RP patients were like those found in control subjects with low contrast stimuli of 16% and 6%. Conclusion: The PVEPs spatial functions of RP patients show quantitative and qualitative changes, suggesting disease induced alteration in the neural processing of stimulus contrast. View Full-Text
Keywords: pattern reversal visual evoked potentials; P100-spatial functions; retinitis pigmentosa; visual cortex pattern reversal visual evoked potentials; P100-spatial functions; retinitis pigmentosa; visual cortex
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MDPI and ACS Style

Mancebo-Azor, R.; Sáez-Moreno, J.A.; Rodríguez-Ferrer, J.M. Cortical Contrast Processing in Retinitis Pigmentosa: Evidence of PVEPs Spatial Functions. Eur. J. Investig. Health Psychol. Educ. 2020, 10, 1010-1019. https://doi.org/10.3390/ejihpe10040071

AMA Style

Mancebo-Azor R, Sáez-Moreno JA, Rodríguez-Ferrer JM. Cortical Contrast Processing in Retinitis Pigmentosa: Evidence of PVEPs Spatial Functions. European Journal of Investigation in Health, Psychology and Education. 2020; 10(4):1010-1019. https://doi.org/10.3390/ejihpe10040071

Chicago/Turabian Style

Mancebo-Azor, Rafael, José A. Sáez-Moreno, and José M. Rodríguez-Ferrer 2020. "Cortical Contrast Processing in Retinitis Pigmentosa: Evidence of PVEPs Spatial Functions" European Journal of Investigation in Health, Psychology and Education 10, no. 4: 1010-1019. https://doi.org/10.3390/ejihpe10040071

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