4.7 Article

The Fine-Scale Functional Correlation of Striate Cortex in Sighted and Blind People

期刊

JOURNAL OF NEUROSCIENCE
卷 33, 期 41, 页码 16209-16219

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SOC NEUROSCIENCE
DOI: 10.1523/JNEUROSCI.0363-13.2013

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资金

  1. Pennsylvania State CURE Grant [P30 EY00 1583, P30 NS045839-08]
  2. National Institutes of Health Grant [1 R01 EY020516-01A1]

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To what extent are spontaneous neural signals within striate cortex organized by vision? We examined the fine-scale pattern of striate cortex correlations within and between hemispheres in rest-state BOLD fMRI data from sighted and blind people. In the sighted, we find that corticocortico correlation is well modeled as a Gaussian point-spread function across millimeters of striate cortical surface, rather than degrees of visual angle. Blindness produces a subtle change in the pattern of fine-scale striate correlations between hemispheres. Across participants blind before the age of 18, the degree of pattern alteration covaries with the strength of long-range correlation between left striate cortex and Broca's area. This suggests that early blindness exchanges local, vision-driven pattern synchrony of the striate cortices for long-range functional correlations potentially related to cross-modal representation.

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