Jay Hegdé, Ph.D.
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Research Interests: Systems Neuroscience in general, Vision as Inference in particular.
Research Methodologies: Multi-area, multi-electrode recording in awake, behaving monkeys, functional magnetic resonance imaging (fMRI) in humans and monkeys, psychophysics in humans and monkeys, statistical and neural network modeling.
Positions Available:
The following positions are available in my laboratory at this time. Please contact me if you are interested in either of these positions (my contact information is provided at the bottom of this page):
Post-doctoral fellow(s)
Research Assistant
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Postdoctoral Fellow in Visual Neuroscience
Brain Discovery Institute
Medical College of Georgia
Augusta, GA, USA
The laboratory of Jay Hegdé at the Brain Discovery Institute at the Medical College of Georgia has an immediate opening for a postdoctoral researcher.
We study the neural mechanisms of visual perception as statistical (Bayesian) inference. We use a variety of research methods, including multiunit recordings in awake, behaving monkeys, fMRI in humans and monkeys, psychophysics and computational modeling. Strongly motivated, self-driven individuals with prior experience in at least one of these fields and the desire to gain expertise in one or more of the others are especially encouraged to apply.
The laboratory is one of several highly collegial and interactive groups at the Brain Discovery Institute. The Institute is an exciting new center for systems neuroscience, with plans for rapid expansion in the immediate future. Medical College of Georgia has strong research programs in other neuroscientific disciplines, including molecular, cellular and developmental neuroscience, and a variety of related clinical disciplines. Opportunities for research collaborations also exist at the adjacent VA Hospital.
Augusta, the second largest city in Georgia, is renowned internationally for its annual Masters golf tournament. Known as the ‘Flower City’, Augusta features picturesque neighborhoods, low cost of living, and plenty of cultural and recreational opportunities. Larger metropolitan areas such as Atlanta and Columbia, SC are within two hours’ drive, as are many scenic destinations, including the Blue Ridge Mountains and the Atlantic coast.
To apply, please send (i) curriculum vitae and (ii) a cover letter describing research accomplishments and interests, and have two letters of recommendation sent to Jay Hegdé at the address below, preferably as email attachments.
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SELECTED PUBLICATIONS
ORIGINAL RESEARCH PAPERS
Note: This page does not list manuscripts in press, in revision, in review, or in preparation.
Hegdé, J. and Felleman, D.J. The popout in some conjunction searches is due to perceptual grouping.
NeuroReport 10:143-148 (1998). [Cover Article]
Hegdé, J. and Van Essen, D.C. Selectivity for complex shapes in primate visual area V2.
Journal of Neuroscience 20:RC61-66 (2000).
Hegdé. J. and Felleman, D.J. How selective are V1 cells for pop-out stimuli?
Journal of Neuroscience 23:9968-9980 (2003). [Cover Article]
Hegdé, J. and Van Essen, D.C. Strategies of shape representation in macaque visual area V2. Selectivity for
complex shapes in primate visual area V2.
Visual Neuroscience 20:313-328 (2003). [Cover Article]
Hegdé, J. and Van Essen, D.C. Temporal dynamics of shape representation in macaque visual area V2.
Journal of Neurophysiology 92: 3030-3042 (2004).
Hegdé, J., Albright, T.D. and Stoner, G.R. Second-order motion conveys depth order information.
Journal of Vision 4:838-842 (2004).
Hegdé, J. and Van Essen, D.C. Stimulus dependence of disparity coding in primate visual area V4.
Journal of Neurophysiology 93:620-626 (2005).
Hegdé, J. and Felleman, D.J. Modeling the observed center-surround summation in macaque visual area V1.
Neurocomputing 63:499-525 (2005).
Hegdé, J. and Van Essen, D.C. Role of primate visual area V4 in the processing of 3-D shape
characteristics defined by disparity.
Journal of Neurophysiology 94:2856-2866 (2005).
Hegdé, J. and Van Essen, D.C. Temporal dynamics of 2-D and 3-D shape representation in macaque visual area V4.
Visual Neuroscience 23:749-763 (2006). [Cover Article]
Hegdé, J. and Van Essen, D.C. A comparative study of form processing in primate visual areas V4, V2 and V1.
Cerebral Cortex 17:1100-1116 (2007). [Cover Article] [Faculty of 1000 selection]
Hegdé, J., Fang, F., Murray, S.O. and Kersten, D. Preferential responses to occluded objects in the human visual cortex.
Journal of Vision 8:16.1-16.16 (2008).
Hegdé, J., Bart, E. and Kersten, D. Fragment-based learning of visual object categories.
Current Biology 18:597-601 (2008).
[Comment in: Vuong, QC. Visual categorization: when categories fall to pieces. Current Biology 18:R427-429 (2008)]
REVIEWS/COMMENTARIES
Boynton, G. and Hegdé, J. Visual cortex: The continuing puzzle of area V2.
Current Biology 14:R523-R524 (2004). [Invited article]
Hegdé, J. Search for the neural correlates of perceptual learning
Journal of Neuroscience 26:8877-8878 (2006).
Hegdé, J. and Johnson, N. A. Folk psychology meets folk Darwinism.
Behavioral and Brain Sciences 29:476-477 (2006).
Hegdé, J. and Felleman, D. J. Reappraising the functional implications of
the primate visual anatomical hierarchy.
The Neuroscientist13:416-421 (2007). [Invited article]
Hegdé, J. Mental time travel sickness and a Bayesian remedy.
Behavioral and Brain Sciences 30:323-324 (2007).
Hegdé, J. Time course of visual perception: Coarse-to-fine processing and beyond.
Progress in Neurobiology 84:405-439 (2008).
ABSTRACTS
Hegdé, J., Xiao, Y., Emery, J.M. and Felleman, D.J. Effects of adult onset
of aphakia on the functional architecture of macaque LGN and V1.
Investigative Ophthalmology and Visual Science 35:2411 (1994).
Hegdé, J. and Felleman, D.J. Distribution of parvalbumin and SMI32 immunoreactivities
in extrastriate visual cortex of the macaque.
Society of Neuroscience Abstract 20:428 (1995).
Hegdé, J. and Felleman, D.J. Parallel processing or perceptual grouping?
Society of Neuroscience Abstract 21:512 (1996).
Hegdé, J. and Felleman, D.J. Neurons in area V1 respond similarly to pop-out and non-popout stimuli.
Investigative Ophthalmology and Visual Science 37:S484 (1996).
Hegdé, J. and Van Essen, D.C. Selectivity for Contours in visual area V2.
Investigative Ophthalmology and Visual Science 38:4492 (1997).
Hegdé, J. and Van Essen, D.C. Selectivity for non-Cartesian and conventional gratings in visual area V2.
Society for Neuroscience Abstracts 23:1395 (1997).
Hegdé, J. and Van Essen, D.C. Population analyses of selectivity for contour and grating stimuli
in macaque viual area V2.
Society for Neuroscience Abstracts 24:1506 (1998).
Hegdé, J. and Van Essen, D.C. Selectivity for complex forms in primate visual area V1.
Society for Neuroscience Abstracts 25:1548 (1999).
Hegdé, J. and Felleman, D.J. Linearity of center-surround summation of low contrast stimuli
in primate visual area V1.
Society of Neuroscience Abstracts 26:141 (2000).
Hegdé, J. and Van Essen, D.C. Selectivity for 3-D shape characteristics defined by stereoscopic disparity
in macaque visual area V4.
Society for Neuroscience Abstracts 27:165.7 (2001).
Anzai, A., Van Essen, D.C., Peng, X. and Hegdé, J. Receptive field structure
of monkey V2 neurons for encoding orientation contrast.
Journal of Vision 2:221a (2002).
Hegdé, J., Albright, T.D. and Stoner G.R. Contextual effects of binocular depth cues
and shadow-based depth cues on motion interpretation.
Journal of Vision 3:804a (2003).
Stoner, G.R., Albright, T.D. and Hegdé, J. Depth order perception in first- and second-order motion stimuli.
Journal of Vision 3:799a (2003).
Hegdé, J. and Albright, T.D. Is selective spatial frequency adaptation diagnostic of neuronal mechanisms
of spatial frequency processing? A modeling study.
Society for Neuroscience Abstracts 30:986.20 (2004).
Hegdé, J., Fang, F., Murray, S.O. and Kersten, D. Neural mechanisms of interpretation
of occluded objects: A human fMRI study.
Society for Neuroscience Abstracts 31:768.12 (2005).
Hegdé, J., Thompson, S.K. and Kersten, D. Psychophysical and fMRI studies
of the role of prior knowledge in visual perception.
Vision Sciences Society Abstracts/Journal of Vision 6:677a (2006).
Thompson, S., Hegdé, J. and Kersten, D. Learning novel objects in camouflage.
Visual Learning and Recognition Workshop
Institute of mathematics and Its Applications, University of Minnesota, Minneapolis, MN (2006).
Hegdé, J., Thompson, S. and Kersten, D. Object recognition in cluttered visual scenes:
Is it better to learn objects in the presence or the absence of clutter?
Society for Neuroscience Abstracts 438.19 (2006).
Hegdé, J., Thompson, S. K. and Kersten, D. Identifying faces in two-tone ('Mooney') images:
A psychophysical and fMRI study.
Journal of Vision 7:624 (2007).
Jay Hegdé
Brain and Behavior Discovery Institute / Department of Ophthalmology
Medical College of Georgia
1120 15th Street
Augusta, GA 30912
Email: jhegde AT mcg.edu / jay AT hegde.us
Phone: 706-721-3760
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