<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>1665-5044</journal-id>
<journal-title><![CDATA[Revista mexicana de neurociencia]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. mex. neurocienc.]]></abbrev-journal-title>
<issn>1665-5044</issn>
<publisher>
<publisher-name><![CDATA[Academia Mexicana de Neurología A.C.]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1665-50442021000100015</article-id>
<article-id pub-id-type="doi">10.24875/rmn.20000063</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Giant visual evoked potentials and their related factors in Mexican patients]]></article-title>
<article-title xml:lang="es"><![CDATA[Potenciales visuales gigantes evocados y sus factores relacionados en pacientes mexicanos]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Hernández-Zepeda]]></surname>
<given-names><![CDATA[Alfonso]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Hernández-Cervantes]]></surname>
<given-names><![CDATA[Josefina]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Varela-Blanco]]></surname>
<given-names><![CDATA[Jorge]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[García]]></surname>
<given-names><![CDATA[Silvia]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Enríquez-Sánchez]]></surname>
<given-names><![CDATA[Luis B.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Aguirre-Baca]]></surname>
<given-names><![CDATA[David A.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Camarillo-Cisneros]]></surname>
<given-names><![CDATA[Javier]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Hinojos-Gallardo]]></surname>
<given-names><![CDATA[Luis C.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Instituto de Seguridad y Servicios Sociales de los Trabajadores del Estado Centro Médico Nacional 20 de Noviembre ]]></institution>
<addr-line><![CDATA[Mexico City ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Central State Hospital Departament of General Surgery ]]></institution>
<addr-line><![CDATA[Chihuahua ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad Autónoma de Chihuahua Faculty of Medicine and Biomedical Sciences ]]></institution>
<addr-line><![CDATA[Chihuahua ]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>02</month>
<year>2021</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>02</month>
<year>2021</year>
</pub-date>
<volume>22</volume>
<numero>1</numero>
<fpage>15</fpage>
<lpage>21</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1665-50442021000100015&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1665-50442021000100015&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1665-50442021000100015&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Background: In the analysis of electrical signals evoked through the application of appropriate stimuli to special sensory systems, the prolongation of latency and the incremented amplitude of the components studied are generally considered fundamental anomalies. However, the exaggerated increase in amplitude can also be an indicator of dysfunction in the central nervous system.  Objective: The objective of the study was to evaluate giant visual evoked potentials (VEPs) and their related factors in patients at the Centro Médico Nacional (CMN) 20 de Noviembre.  Materials and methods: At the CMN 20 de Noviembre, a descriptive, observational, and cross-sectional analysis of patients was performed at the Clinical Neurophysiology service, which found giant VEPs in the period from 2012 to 2018. The information obtained was from the clinical record of patients who met the selection criteria of the population to be studied. The IBM SPSS version 22.0 program was used for the statistical analysis.  Results: A total sample of 36 patients was collected; the average age of the patients included in the study was 25.61 months. To improve and standardize the management of information, the population was divided into six categories according to the age group to which they belonged. The most frequent comorbidity of the patients was prematurity, observed in 63.9% (n = 23). No statistically significant difference was observed in the distribution of findings found in the different amplitudes and latencies regarding the age of the patient.  Conclusions: There are greater latency and less amplitude in patients with giant visual evoked potentials.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Antecedentes: En el análisis de las señales eléctricas evocadas mediante la aplicación de estímulos apropiados a sistemas sensoriales especiales, la prolongación de la latencia y la disminución de la amplitud de los componentes estudiados se consideran generalmente anomalías fundamentales. Sin embargo, el aumento exagerado de la amplitud también puede ser indicador de disfunción del sistema nervioso central (SNC).  Objetivo: Evaluar potenciales evocados visuales gigantes y factores relacionados en pacientes en el Centro Médico Nacional (CMN) 20 de Noviembre.  Materiales and métodos: Se realizó un análisis descriptivo, observacional y transversal en el CMN 20 de Noviembre de pacientes del Servicio de neurofisiología clínica en quienes se encontraron potenciales evocados visuales gigantes en el período 2012-2018. La información obtenida procede del expediente clínico de los pacientes que cumplieron los criterios de selección de la población a estudiar. Para el análisis estadístico se utilizó el programa IBM SPSS versión 22.0.  Resultados: Se recogió una muestra de 36 pacientes; la edad media de los pacientes incluidos en el estudio fue de 25.61 meses. Para mejorar y estandarizar el manejo de la información, la población se dividió en seis categorías según el grupo de edad al que pertenecía. La comorbilidad más frecuente de los pacientes fue nacimiento prematuro, observada en 63,9% (n = 23). No se observaron diferencias estadísticamente significativas en los hallazgos de distribución de las amplitudes y latencias con respecto a la edad del paciente.  Conclusiones: Hay una mayor latencia y una menor amplitud en los pacientes con potenciales evocados visuales gigantes.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Evoked potentials]]></kwd>
<kwd lng="en"><![CDATA[Amplitude]]></kwd>
<kwd lng="en"><![CDATA[Latency]]></kwd>
<kwd lng="es"><![CDATA[Potenciales evocados]]></kwd>
<kwd lng="es"><![CDATA[Amplitud]]></kwd>
<kwd lng="es"><![CDATA[Latencia]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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