Perceived egocentric distance sensitivity and invariance across scene-selective cortex Público

Abstract

Behavioral studies in many species and studies in robotics have demonstrated two sources of information critical for visually-guided navigation: sense (left-right) information and egocentric distance (proximal-distal) information. A recent fMRI study found sensitivity to sense information in two scene-selective cortical regions, the retrosplenial complex (RSC) and the occipital place area (OPA), consistent with hypotheses that these regions play a role in human navigation. Surprisingly, however, another scene-selective region, the parahippocampal place area (PPA), was not sensitive to sense information, challenging hypotheses that this region is directly involved in navigation. Here we conduct a stronger test of the involvement of these regions in navigation, by investigating how these regions encode egocentric distance information (e.g., a house seen from close up versus far away), another type of information crucial for navigation. Using fMRI adaptation in human adults, we found no sensitivity to egocentric distance information in PPA, while RSC and OPA showed sensitivity to such information. These findings further support that RSC and OPA may be directly involved in navigation, while PPA is not, and suggest that scenes are processed by distinct pathways guiding navigation and recognition.

Table of Contents

I. Introduction. 1

II. Methods. 3

III. Results. 8

IV. Discussion. 14

V. References. 21

VI.Figure Captions. 25

VII. Figures. 27

About this Master's Thesis

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School	Laney Graduate School
Department	Psychology
Degree	MA
Submission	Master's Thesis
Language	English
Research Field	Philosophy Biology, Neuroscience Psychology, Cognitive
Palabra Clave	scene recognition Retrosplenail Complex (RSC) fMRI adaptation Parahippcampal Place Area (PPA) Occipital Place Area (OPA)
Committee Chair / Thesis Advisor	Dilks, Daniel D, Emory University
Committee Members	Manns, Joseph, Emory University Wolff, Phillip, Emory University

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