Journal
NEURON
Volume 109, Issue 16, Pages 2616-+Publisher
CELL PRESS
DOI: 10.1016/j.neuron.2021.06.004
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Funding
- Department of Psychology at Princeton University
- Faculty of Arts and Sciences at Yale University
- Canadian Institute for Advanced Research
- Princeton Neuroscience Institute at Princeton University
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Infants show multiple visual maps throughout the visual cortex, indicating a higher level of maturity in the extrastriate cortex. These maps exhibit subtle age-related fine-tuning, suggesting that early maturation undergoes continued refinement.
Vision develops rapidly during infancy, yet how visual cortex is organized during this period is unclear. In particular, it is unknown whether functional maps that organize the mature adult visual cortex are present in the infant striate and extrastriate cortex. Here, we test the functional maturity of infant visual cortex by performing retinotopic mapping with functional magnetic resonance imaging (fMRI). Infants aged 5-23 months had retinotopic maps, with alternating preferences for vertical and horizontal meridians indicating the boundaries of visual areas V1 to V4 and an orthogonal gradient of preferences from high to low spatial frequencies. The presence of multiple visual maps throughout visual cortex in infants indicates a greater maturity of extrastriate cortex than previously appreciated. The areas showed subtle age-related fine-tuning, suggesting that early maturation undergoes continued refinement. This early maturation of area boundaries and tuning may scaffold subsequent developmental changes.
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