Adolescents' and adults' sensitivity differs around the visual field

Myers, Caroline; Carrasco, Marisa

doi:10.1167/jov.20.11.873

Cited by 6 publications

(6 citation statements)

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“…As children grow to become adults and their height increases, their visual environment consists of more important events and actions below fixation 80 –for example, visuomotor manipulation such as reaching and tool use 81 – 83 . This is congruent with evidence that the behavioral VMA emerges in late adolescence 84 . We plan to investigate whether the cortical VMA emerges at a similar period by quantifying the cortical polar angle asymmetries in adolescents, allowing us to uncover whether the emergence of the behavioral VMA is linked to the emergence of the cortical VMA.…”

Section: Discussionsupporting

confidence: 89%

Comparing retinotopic maps of children and adults reveals a late-stage change in how V1 samples the visual field

et al. 2023

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Adult visual performance differs with angular location –it is better for stimuli along the horizontal than vertical, and lower than upper vertical meridian of the visual field. These perceptual asymmetries are paralleled by asymmetries in cortical surface area in primary visual cortex (V1). Children, unlike adults, have similar visual performance at the lower and upper vertical meridian. Do children have similar V1 surface area representing the upper and lower vertical meridian? Using MRI, we measure the surface area of retinotopic maps (V1-V3) in children and adults. Many features of the maps are similar between groups, including greater V1 surface area for the horizontal than vertical meridian. However, unlike adults, children have a similar amount of V1 surface area representing the lower and upper vertical meridian. These data reveal a late-stage change in V1 organization that may relate to the emergence of the visual performance asymmetry along the vertical meridian by adulthood.

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Section: Discussionsupporting

confidence: 89%

Comparing retinotopic maps of children and adults reveals a late-stage change in how V1 samples the visual field

et al. 2023

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“…As children grow to become adults and their height increases, their visual environment consists of more important events and actions below fixation-for example, visuomotor manipulation such as reaching and tool use 80 . This is congruent with evidence that the behavioral VMA emerges in late adolescence 12,81 . We plan to investigate whether the cortical VMA emerges at a similar period by quantifying the cortical polar angle asymmetries in adolescents, allowing us to uncover whether the emergence of a cortical VMA is linked to the emergence of the behavioral VMA.…”

Section: Ecological Considerationssupporting

confidence: 89%

Comparing visual cortex of children and adults reveals a late-stage change in the architecture of V1

Himmelberg

Tuncok²,

Gomez

et al. 2022

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Adult visual ability differs markedly with stimulus polar angle location: relative to fixation, visual performance is best for stimuli along the horizontal, intermediate for stimuli along the lower vertical, and poorest for stimuli along the upper vertical meridian of the visual field. These polar angle asymmetries in visual performance are paralleled by cortical asymmetries in the visual field representation in primary visual cortex (V1). Whereas children, like adults, have better performance for stimuli along the horizontal than vertical meridian, children show no difference in performance for stimuli along the lower vs upper vertical meridian. Is the difference in visual performance between children and adults matched by a difference in the amount of V1 surface area representing these regions? We used fMRI to measure the distribution of cortical surface representing the visual field in children (n=24) and adults (n=24). Two properties of the V1, V2, and V3 maps were mature in children –overall map surface area and surface area variation as a function of eccentricity. Further, like adults, children had greater V1 surface area representing the horizontal than vertical meridian. However, unlike adults, children did not have greater V1 surface area representing the lower than upper vertical meridian. These data indicate a late-stage change in the architecture of V1 that may drive the emergence of a visual performance asymmetry along the vertical meridian by adulthood.

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“…These results suggest that the HVA and VMA are independent of each other at the level of perception and at the level of the cortex. It is likely that these two behavioral asymmetries develop with age independently 79 and may have separate neural substrates. Cortical magnification changes as a function of eccentricity in a similar fashion for children and adults 80 ; However, perceptual polar angle asymmetries vary between children and adults 81 and how cortical magnification changes as a function of polar angle in children still needs to be determined.…”

Section: Discussionmentioning

confidence: 99%

Linking individual differences in human primary visual cortex to contrast sensitivity around the visual field

2022

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A central question in neuroscience is how the organization of cortical maps relates to perception, for which human primary visual cortex (V1) is an ideal model system. V1 nonuniformly samples the retinal image, with greater cortical magnification (surface area per degree of visual field) at the fovea than periphery and at the horizontal than vertical meridian. Moreover, the size and cortical magnification of V1 varies greatly across individuals. Here, we used fMRI and psychophysics in the same observers to quantify individual differences in V1 cortical magnification and contrast sensitivity at the four polar angle meridians. Across observers, the overall size of V1 and localized cortical magnification positively correlated with contrast sensitivity. Moreover, greater cortical magnification and higher contrast sensitivity at the horizontal than the vertical meridian were strongly correlated. These data reveal a link between cortical anatomy and visual perception at the level of individual observer and stimulus location.

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Adolescents' and adults' sensitivity differs around the visual field

Cited by 6 publications

References 0 publications

Comparing retinotopic maps of children and adults reveals a late-stage change in how V1 samples the visual field

Comparing retinotopic maps of children and adults reveals a late-stage change in how V1 samples the visual field

Comparing visual cortex of children and adults reveals a late-stage change in the architecture of V1

Linking individual differences in human primary visual cortex to contrast sensitivity around the visual field

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