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Revista mexicana de neurociencia

versão On-line ISSN 2604-6180versão impressa ISSN 1665-5044


HERNANDEZ-ZEPEDA, Alfonso et al. Giant visual evoked potentials and their related factors in Mexican patients. Rev. mex. neurocienc. [online]. 2021, vol.22, n.1, pp.15-21.  Epub 23-Abr-2021. ISSN 2604-6180.


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.


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.


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.


There are greater latency and less amplitude in patients with giant visual evoked potentials.

Palavras-chave : Evoked potentials; Amplitude; Latency.

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