Dissociation of neuronal and psychophysical responses to local and global motion

James H. Hedges, Yevgeniya Gartshteyn, Adam Kohn, Nicole C. Rust, Michael N. Shadlen, William T. Newsome, J. Anthony Movshon

Research output: Contribution to journalArticle

42 Citations (Scopus)

Abstract

Most neurons in cortical area MT (V5) are strongly direction selective [1-4], and their activity is closely associated with the perception of visual motion [reviewed in 5]. These neurons have large receptive fields built by combining inputs with smaller receptive fields that respond to local motion [6]. Humans integrate motion over large areas and can perceive what has been referred to as global motion. The large size and direction selectivity of MT receptive fields suggests that MT neurons may represent global motion. We have explored this possibility by measuring responses to a stimulus in which the directions of simultaneously presented local and global motion are independently controlled. Surprisingly, MT responses depended only on the local motion and were unaffected by the global motion. Yet, under similar conditions, human observers perceive global motion and are impaired in discriminating local motion. Although local motion perception might depend on MT signals, global motion perception depends on mechanisms qualitatively different from those in MT. Motion perception therefore does not depend on a single cortical area but reflects the action and interaction of multiple brain systems.

Original languageEnglish (US)
Pages (from-to)2023-2028
Number of pages6
JournalCurrent Biology
Volume21
Issue number23
DOIs
StatePublished - Dec 6 2011

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Neurons
neurons
Motion Perception
Brain
brain
Direction compound
Visual Perception
visual perception

ASJC Scopus subject areas

  • Agricultural and Biological Sciences(all)
  • Biochemistry, Genetics and Molecular Biology(all)

Cite this

Hedges, J. H., Gartshteyn, Y., Kohn, A., Rust, N. C., Shadlen, M. N., Newsome, W. T., & Movshon, J. A. (2011). Dissociation of neuronal and psychophysical responses to local and global motion. Current Biology, 21(23), 2023-2028. https://doi.org/10.1016/j.cub.2011.10.049

Dissociation of neuronal and psychophysical responses to local and global motion. / Hedges, James H.; Gartshteyn, Yevgeniya; Kohn, Adam; Rust, Nicole C.; Shadlen, Michael N.; Newsome, William T.; Movshon, J. Anthony.

In: Current Biology, Vol. 21, No. 23, 06.12.2011, p. 2023-2028.

Research output: Contribution to journalArticle

Hedges, JH, Gartshteyn, Y, Kohn, A, Rust, NC, Shadlen, MN, Newsome, WT & Movshon, JA 2011, 'Dissociation of neuronal and psychophysical responses to local and global motion', Current Biology, vol. 21, no. 23, pp. 2023-2028. https://doi.org/10.1016/j.cub.2011.10.049
Hedges JH, Gartshteyn Y, Kohn A, Rust NC, Shadlen MN, Newsome WT et al. Dissociation of neuronal and psychophysical responses to local and global motion. Current Biology. 2011 Dec 6;21(23):2023-2028. https://doi.org/10.1016/j.cub.2011.10.049
Hedges, James H. ; Gartshteyn, Yevgeniya ; Kohn, Adam ; Rust, Nicole C. ; Shadlen, Michael N. ; Newsome, William T. ; Movshon, J. Anthony. / Dissociation of neuronal and psychophysical responses to local and global motion. In: Current Biology. 2011 ; Vol. 21, No. 23. pp. 2023-2028.
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