Binocular Rivalry

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Binocular Rivalry
Presentation to the University of Florida
McKnight Brain Institute, Functional Magnetic
Resonance Imaging Journal Club 9 Feb 2000
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Overview of the presentation
Demonstrations Why we became interested in
binocular rivalry Literature background (incl.
Logothetis paper) Binocular rivalry's fMRI
correlates (incl. Lumer Rees paper)
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Demonstrations
Three ways to experience binocular competition
See through the hole in your hand Breese's closed
eyes example Head-mounted display
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Interest Pettigrew
Psychophysical studies including neuropsychiatric
patients
Many patients with bipolar disorder have unusual
rivalry rates Most show slower than normal rates
of perceptual alternation A few show fast
alternation or infrequent alternation
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Background Logothetis
Single unit recordings along the visual pathways
Striate cortex - 90 of cells repond as long as
the stimulus is present on the retina, regardless
of perceptual state during rivalry Inferotemporal
cortex - most cells' responses correlate with
the reported perceptual state during rivalry
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Uncorrelated
Correlated
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Lumer and Rees Stimuli for Producing Binocular
Rivalry
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Fmri Correlates Lumer Rees
Rivalry response histograms (Science paper)
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FMRI Correlates Lumer Rees
Estimation of hemodynamic response (Science paper)
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