Temporal and spatial properties of the BOLD fMRI response to first and second order contrast in V1
MD, Department of Neurology, Medical College of Wisconsin
Undergraduate Institution and Major/Degree:
University of Southern California, BS, Biomedical-Electrical Engineering
Low-level and object-salient features influence perception, but questions remain about how these features interact. We study the effects of contrast, luminance, and orientation of visual features on target detectability, and are pursuing experiments that investigate these features' relation to figure-ground assignment.
We are also interested in how people learn to identify ambiguous objects using both behavioral and functional imaging techniques.
- Babak Ziaie
- Walter Low
- Peter Steinmetz
- Daniel Kersten
- Kelvin Lim
Courses Taken Beyond the Core Courses:
- Mathematical Modeling of Human Behavior
- Several Vision Seminars and fMRI Seminars/Courses
- Signal Detection Theory
- Computational Neuroscience
Graduate Level Minor:
- Society for Neuroscience, 2006
- Vision Sciences Society, 2006, 2007
- Sheng He (chair)
- Daniel Kersten
- Cheryl Olman
- Geoff Ghose
- Thompson SK, Engel SA, Olman CA. Larger neural responses produce BOLD signals that begin earlier in time. Front Neurosci. 2014 Jun 12;8:159. Front Hum Neurosci. 2012 Jun 19;6:170
- Hegdé J, Thompson SK, Brady M, Kersten D. Object recognition in clutter: cortical responses depend on the type of learning.
- Schumacher JF, Thompson SK, Olman CA. Contrast response functions for single gabor patches: ROI-based analysis over-represents low-contrast patches for GE BOLD. Front Syst Neurosci. 2011 Mar 24;5:19.
- Hegdé J, Thompson S, Kersten D. Psychophysical and fMRI studies of the role of prior knowledge in visual perception
- Hegdé J, Thompson S, Kersten D. Object recognition in cluttered visual scenes: Is it better to learn objects in the presence or the absence of clutter?
Awards and Honors:
- Center for Cognitive Sciences trainee, 2004-5, 2005-6, 2006-7
- Kamuela, HI/Grand Forks, ND