报告题目: |
Discovering structured selectivity profiles in the ventral visual stream |
报告人: |
Edward Vul |
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Ph.D.
Assistant Professor, Department of Psychology,
University of California, USA
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报告时间: |
2010-12-21 10:00 |
报告地点: |
医学科学楼B321 |
主办单位: |
医学院 |
简介: |
Selectivity for faces, places, and bodies feature prominently in the literature on the ventral visual pathway. Are face, place, and body selectivity in fact the most robust and dominant response profiles in this region, or are they merely three among a much wider set of category-selective (and other) response profiles? Here we use a hypothesis-neutral structure discovery method that avoids the assumptions built into most past work by i) giving equal consideration to all possible response profiles over the conditions tested, ii) relaxing implicit anatomical constraints (that important functional profiles should be manifest in spatially contiguous voxels, and in a similar locations across subjects), and iii) testing for dominant response profiles over images, rather than categories, thus enabling us to discover rather than presume the categories respected by the brain. Even with these assumptions relaxed, face, place, and body selectivity emerge as dominant in the ventral stream. |
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