The Representation of the Visual Field in Human Striate Cortex

Horton, Jonathan C.

doi:10.1001/archopht.1991.01080060080030

Cited by 676 publications

(504 citation statements)

References 27 publications

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“…The absence of a polarity inversion in this case might be explained by the anatomy of the calcarine sulcus. Based on Horton and Hoyt's (1991b) map of the representation of the visual field in V1, we speculate that the curvature of the upper calcarine bank representing peripheral locations from 10° to 20° (the eccentricity range with a larger P2) might result in signal cancelation at the scalp. In contrast, the lower bank of the calcarine would not be subjected to this opposing geometry, resulting in clear responses when the upper visual field is stimulated.…”

Section: P2 Componentmentioning

confidence: 96%

“…Stimuli consisted of a dartboard centered on a gray background, as employed in mfVEPs studies (Baseler et al, 1994;Horton and Hoyt, 1991b;Wu et al, 2012). The diameter of the dartboard was 40 cm.…”

Section: Stimuli and Proceduresmentioning

confidence: 99%

“…It was divided into 60 sectors of different polar angle and eccentricity. Each sector comprised a white and black checkerboard of 4 by 4 checks, scaled accordingly to compensate for cortical magnification (Baseler et al, 1994;Horton and Hoyt, 1991b;Wu et al, 2012). Thus, the sectors were placed in six concentric rings of radius 1.2°, 2.6°, 5.8°, 9.8°, 14.9° and 22.2° (see Figure 1).…”

Section: Stimuli and Proceduresmentioning

confidence: 99%

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Retinotopic mapping of visual event-related potentials

Capilla

Melcón

Kessel

et al. 2016

Biological Psychology

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Esta es la versión de autor del artículo publicado en: This is an author produced version of a paper published in:Biological Psychology 118 (2016) ABSTRACTVisual 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. C1and 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. HIGHLIGHTS Extensive and multichannel retinotopic mapping of major visual ERP components. C1 and C2 components showed inverted polarity for upper and lower hemifields. P1 and N1 components were larger when the contralateral lower field was stimulated. P2 showed higher amplitude and shorter latency for peripheral upper field stimuli. Present results can be used to select optimal stimulus locations in ERP designs.

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Section: P2 Componentmentioning

confidence: 96%

Section: Stimuli and Proceduresmentioning

confidence: 99%

Section: Stimuli and Proceduresmentioning

confidence: 99%

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Retinotopic mapping of visual event-related potentials

Capilla

Melcón

Kessel

et al. 2016

Biological Psychology

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“…Os 10° centrais do campo visual, que correspondem a aproximadamente 2% do campo total, utilizam mais de 50% do córtex visual primário (13) . Enquanto a acuidade visual, de acordo com a densidade de fotorreceptores, diminui exponencialmente com o aumento da excentricidade na retina.…”

Section: Resumo Introduçãounclassified

Textos padronizados em português (BR) para medida da velocidade de leitura: comparação com quatro idiomas europeus

Messias¹,

Cruz²,

Schallenmüller³

et al. 2008

Arq. Bras. Oftalmol.

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“…From human lesion studies, [5][6][7] and later neurophysiology studies in non-human primates, 8,9 it had been known for nearly a century that each visual area has a retinotopic map of space, although somewhat distorted. Using this knowledge, several groups in the mid 1990s designed a paradigm, now referred to as 'retinotopic mapping', that allows individual visual areas to be distinguished.…”

Section: Retinotopic Mappingmentioning

confidence: 99%

Mapping the visual brain: how and why

Bridge

2010

Eye

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Over the past 15 years, techniques for identifying visual areas using magnetic resonance imaging (MRI) in human subjects have been applied widely to multiple populations. This review will cover the basic techniques of using functional MRI and very high-resolution structural MRI to determine boundaries between different areas of the visual cortex. Recent applications of these methods to ophthalmological patient populations are discussed, and the future potential applications of very high field strength MRI are considered.

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The Representation of the Visual Field in Human Striate Cortex

Cited by 676 publications

References 27 publications

Retinotopic mapping of visual event-related potentials

Retinotopic mapping of visual event-related potentials

Textos padronizados em português (BR) para medida da velocidade de leitura: comparação com quatro idiomas europeus

Mapping the visual brain: how and why

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