Fine-scale spatial organization of face- and limb-selective regions in human high-level visual cortex
Abstract/Contents
- 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 high-level visual cortex selective for images of biologically relevant categories such as faces and limbs. Implementing higher resolution (1.5mm voxels) fMRI scanning methods than prior studies (3-5mm voxels), the results reported in this dissertation illustrate a topographic organization of face- and limb-selective regions in adjacent and alternating clusters in both ventral temporal and lateral occipitotemporal cortices. Region of interest analyses in a series of experiments indicate distinct category and position sensitivities within these clusters and multivoxel pattern analyses indicate different amounts of information in highly-, weakly-, and non-selective voxels for these categories. These results mediate the debate between modular and distributed theories of high-level visual cortex, as well as support a novel, sparsely-distributed organization including both locally clustered and distributed elements for face and limb representations. These results also reveal two new basic organization principles of high-level visual cortex where there is both a consistency in the anatomical location of functional regions, as well as a preserved spatial relationship among functional regions. Employing these two principles enables the first framework for consistent parcellation of high-level visual regions outside of retinotopic cortex. Importantly, this framework can also be applied to other sensory and nonsensory cortical systems.
Description
| Type of resource | text |
|---|---|
| Form | electronic; electronic resource; remote |
| Extent | 1 online resource. |
| Publication date | 2011 |
| Issuance | monographic |
| Language | English |
Creators/Contributors
| Associated with | Weiner, Kevin Sean |
|---|---|
| Associated with | Stanford University, Department of Psychology |
| Primary advisor | Grill-Spector, Kalanit |
| Thesis advisor | Grill-Spector, Kalanit |
| Thesis advisor | Wagner, Anthony David |
| Thesis advisor | Wandell, Brian A |
| Advisor | Wagner, Anthony David |
| Advisor | Wandell, Brian A |
Subjects
| Genre | Theses |
|---|
Bibliographic information
| Statement of responsibility | Kevin S. Weiner. |
|---|---|
| Note | Submitted to the Department of Psychology. |
| Thesis | Thesis (Ph.D.)--Stanford University, 2011. |
| Location | electronic resource |
Access conditions
- Copyright
- © 2011 by Kevin Sean Weiner
- License
- This work is licensed under a Creative Commons Attribution Non Commercial 3.0 Unported license (CC BY-NC).
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