@article{ref1,
title="Dynamics and cortical distribution of neural responses to 2D and 3D motion in human",
journal="Journal of Neurophysiology",
year="2014",
author="Norcia, Anthony M. and McKee, Susanne P. and Cottereau, Benoit R.",
volume="111",
number="3",
pages="533-543",
abstract="The perception of motion-in-depth is important for avoiding collisions and for the control of vergence eye-movements and other motor actions. Previous psychophysical studies have suggested that sensitivity to motion-in-depth has a lower temporal processing limit than the perception of lateral motion. The present study used fMRI-informed EEG source-imaging to study the spatio-temporal properties of the responses to lateral motion and motion-in-depth in human visual cortex. Lateral motion and motion-in-depth displays comprised stimuli whose only difference was inter-ocular phase - monocular oscillatory motion was either in-phase in the two eyes (lateral motion) or in anti-phase (motion-in-depth). Spectral analysis was used to break the steady-state visually evoked potentials (SSVEP) responses down into even and odd harmonic components within five functionally defined regions of interest (ROIs): V1, V4, lateral occipital complex (LOC), V3A and hMT+. We also characterized the responses within two anatomically defined regions: the inferior and superior parietal cortex. Even harmonic components dominated the evoked responses and were a factor of approximately two larger for lateral motion than motion-in-depth. These responses were slower for motion-in-depth and were largely independent of absolute disparity. In each of our ROIs, responses at odd-harmonics were relatively small, but were larger for motion-in-depth than lateral motion, especially in parietal cortex and depended on absolute disparity. Taken together, our results suggest a plausible neural basis for reduced psychophysical sensitivity to rapid motion-in-depth.<p /> <p>Language: en</p>",
language="en",
issn="0022-3077",
doi="10.1152/jn.00549.2013",
url="http://dx.doi.org/10.1152/jn.00549.2013"
}