期刊
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
卷 104, 期 21, 页码 9087-9092出版社
NATL ACAD SCIENCES
DOI: 10.1073/pnas.0703300104
关键词
learning; vision; fMRI; experience; ventral visual pathway
资金
- NCRR NIH HHS [P41 RR014075, P41-RR14075] Funding Source: Medline
- NEI NIH HHS [R01 EY013455, EY13455] Funding Source: Medline
- NINDS NIH HHS [NS049052] Funding Source: Medline
How do category-selective regions arise in human extrastriate cortex? Visually presented words provide an ideal test of the role of experience: Although individuals have extensive experience with visual words, our species has only been reading for a few thousand years, a period not thought to belong enough for natural selection to produce a genetically specified mechanism dedicated to visual word recognition per se. Using relatively high-resolution functional magnetic resonance imaging (1.4 x 1.4 x 2-mm voxels), we identified a small region of extrastriate cortex in most participants that responds selectively to both visually presented words and consonant strings, compared with line drawings, digit strings, and Chinese characters. Critically, we show that this pattern of selectivity is dependent on experience with specific orthographies: The same region responds more strongly to Hebrew words in Hebrew readers than in nonreaders of Hebrew. These results indicate that extensive experience with a given visual category can produce strong selectivity for that category in discrete cortical regions.
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