title: Retinotopic mapping of visual event-related potentials.
abstract: Visual stimulation is frequently employed in electroencephalographic (EEG) research. However, despite its widespread use, no studies have thoroughly evaluated how the morphology of the visual event-related potentials (ERPs) varies according to the spatial location of stimuli. Hence, the purpose of this study was to perform a detailed retinotopic mapping of visual ERPs. We recorded EEG activity while participants were visually stimulated with 60 pattern-reversing checkerboards placed at different polar angles and eccentricities. Our results show five pattern-reversal ERP components. C1 and C2 components inverted polarity between the upper and lower hemifields. P1 and N1 showed higher amplitudes and shorter latencies to stimuli located in the contralateral lower quadrant. In contrast, P2 amplitude was enhanced and its latency was reduced by stimuli presented in the periphery of the upper hemifield. The retinotopic maps presented here could serve as a guide for selecting optimal visuo-spatial locations in future ERP studies.
authors.affiliation: Departamento de Psicología Biológica y de la Salud, Facultad de Psicología, Universidad Autónoma de Madrid, Madrid, Spain. Electronic address: almudena.capilla@uam.es.
authors.forename: Almudena
authors.initials: A
authors.lastname: Capilla
authors.affiliation: Departamento de Psicología Biológica y de la Salud, Facultad de Psicología, Universidad Autónoma de Madrid, Madrid, Spain.
authors.forename: María
authors.initials: M
authors.lastname: Melcón
authors.affiliation: Departamento de Psicología Biológica y de la Salud, Facultad de Psicología, Universidad Autónoma de Madrid, Madrid, Spain.
authors.forename: Dominique
authors.initials: D
authors.lastname: Kessel
authors.affiliation: Departamento de Psicología Biológica y de la Salud, Facultad de Psicología, Universidad Autónoma de Madrid, Madrid, Spain.
authors.forename: Rosbén
authors.initials: R
authors.lastname: Calderón
authors.affiliation: Departamento de Psicoloxía Clínica e Psicobioloxía, Facultade de Psicoloxía, Universidade de Santiago de Compostela, Santiago de Compostela, Spain.
authors.forename: Paula
authors.initials: P
authors.lastname: Pazo-Álvarez
authors.affiliation: Departamento de Psicología Biológica y de la Salud, Facultad de Psicología, Universidad Autónoma de Madrid, Madrid, Spain.
authors.forename: Luis
authors.initials: L
authors.lastname: Carretié
mesh_terms: D000328:Adult; D001931:Brain Mapping / Q000379:methods*; D004569:Electroencephalography; D005074:Evoked Potentials, Visual; D005260:Female; D006801:Humans; D008297:Male; D010775:Photic Stimulation; D055815:Young Adult
keywords: Beamforming; Event-related potential (ERP); Independent component analysis (ICA); Pattern-reversal; Retinotopic mapping; Source localization; Visual cortex; Visual evoked potential (VEP)