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A Role for MST Neurons in Heading EstimationA template model of human visual self-motion perception (Perrone, JOSA, 1992; Perrone & Stone, Vis. Res., in press), which uses neurophysiologically realistic "heading detectors", is consistent with numerous human psychophysical results (Warren & Hannon, Nature, 1988; Stone & Perrone, Neuro. Abstr., 1991) including the failure of humans to estimate their heading (direction of forward translation) accurately under certain visual conditions (Royden et al., Nature, 1992). We tested the model detectors with stimuli used by others in- single-unit studies. The detectors showed emergent properties similar to those of MST neurons: 1) Sensitivity to non-preferred flow. Each detector is tuned to a specific combination of flow components and its response is systematically reduced by the addition of nonpreferred flow (Orban et al., PNAS, 1992), and 2) Position invariance. The detectors maintain their apparent preference for particular flow components over large regions of their receptive fields (e.g. Duffy & Wurtz, J. Neurophys., 1991; Graziano et al., J. Neurosci., 1994). It has been argued that this latter property is incompatible with MST playing a role in heading perception. The model however demonstrates how neurons with the above response properties could still support accurate heading estimation within extrastriate cortical maps.
Document ID
20010116589
Acquisition Source
Ames Research Center
Document Type
Preprint (Draft being sent to journal)
Authors
Stone, Leland Scott
(NASA Ames Research Center Moffett Field, CA United States)
Perrone, J. A.
(Waikato Univ. Hamilton, New Zealand)
Wade, Charles E.
Date Acquired
August 20, 2013
Publication Date
January 1, 1994
Subject Category
Behavioral Sciences
Meeting Information
Meeting: Society for Neuroscience
Location: Miami Beach, FL
Country: United States
Start Date: November 13, 1994
End Date: November 18, 1994
Sponsors: Society for Neuroscience
Funding Number(s)
PROJECT: RTOP 199-16-12-37
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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