Uncrossed Asymmetry in Pattern Visual Evoked Potentials: A Reappraisal
| Autor: | Takashi Nishida, Jonathan Lubin, Eric J. Ericson, Michael M. Minieka |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Adult
Male medicine.medical_specialty genetic structures Physiology media_common.quotation_subject Optic chiasm Electroencephalography Visual system Audiology Asymmetry Lesion Physiology (medical) medicine Humans Visual Pathways media_common Retrospective Studies Neurologic Examination medicine.diagnostic_test business.industry Magnetic resonance imaging Middle Aged Magnetic Resonance Imaging medicine.anatomical_structure Amplitude Neurology Pattern visual evoked potentials Optic Chiasm Evoked Potentials Visual Female Neurology (clinical) medicine.symptom business |
| Zdroj: | Journal of clinical neurophysiology : official publication of the American Electroencephalographic Society. 33(5) |
| ISSN: | 1537-1603 |
| Popis: | PURPOSE To demonstrate the utility of an uncrossed asymmetry in full-field pattern reversal visual evoked potentials (FF-PVEPs) will accurately predict a retrochiasmal lesion confirmed by MRI. METHODS During an 8-year period, 754 patients had FF-PVEPs performed and analyzed without knowledge of their clinical histories and imaging studies. Interhemispheric amplitude ratios were calculated between N75-P100 and P100-N145 and deemed significant if both demonstrated greater than 50% amplitude asymmetry no matter which eye was stimulated (uncrossed symmetry). RESULTS We identified 11 patients of 754 patients evaluated for 8 years (1.5%) whose FF-PVEP fulfilled our amplitude criteria. Ten of 11 had retrochiasmal lesions confirmed with MRI for a calculated positive predictive value of 91%. CONCLUSIONS These data provide initial support for the hypothesis that specified amplitude criteria in FF-PVEPs can provide evidence for a retrochiasmal lesion. An abnormal interhemispheric amplitude ratio in FF-PVEPs is underrecognized as a diagnostic criterion for retrochiasmal lesion prediction. |
| Databáze: | OpenAIRE |
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