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01-01-2013 | Review | Uitgave 1/2013 Open Access

Psychological Research 1/2013

Neural representations of faces and limbs neighbor in human high-level visual cortex: evidence for a new organization principle

Tijdschrift:
Psychological Research > Uitgave 1/2013
Auteurs:
Kevin S. Weiner, Kalanit Grill-Spector
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Electronic supplementary material

The online version of this article (doi:10.​1007/​s00426-011-0392-x) contains supplementary material, which is available to authorized users.

Abstract

Neurophysiology and optical imaging studies in monkeys and functional magnetic resonance imaging (fMRI) studies in both monkeys and humans have localized clustered neural responses in inferotemporal cortex selective for images of biologically relevant categories, such as faces and limbs. Using higher resolution (1.5 mm voxels) fMRI scanning methods than past studies (3–5 mm voxels), we recently reported a network of multiple face- and limb-selective regions that neighbor one another in human ventral temporal cortex (Weiner and Grill-Spector, Neuroimage, 52(4):1559–1573, 2010) and lateral occipitotemporal cortex (Weiner and Grill-Spector, Neuroimage, 56(4):2183–2199, 2011). Here, we expand on three basic organization principles of high-level visual cortex revealed by these findings: (1) consistency in the anatomical location of functional regions, (2) preserved spatial relationship among functional regions, and (3) a topographic organization of face- and limb-selective regions in adjacent and alternating clusters. We highlight the implications of this structure in comparing functional brain organization between typical and atypical populations. We conclude with a new model of high-level visual cortex consisting of ventral, lateral, and dorsal components, where multimodal processing related to vision, action, haptics, and language converges in the lateral pathway.

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