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Related Experiment Videos

Neural correlates of transformational apparent motion.

P U Tse1

  • 1Department of Psychological and Brain Sciences, H. B. 6207, Moore Hall, Dartmouth College, Hanover NH 03755, Germany. Peter.Tse@dartmouth.edu

Neuroimage
|February 21, 2006
PubMed
Summary

The visual system creates illusory "transformational apparent motion" (TAM) by perceiving continuous shape change instead of abrupt shifts. This study shows form and motion brain areas are more active during TAM perception.

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Area of Science:

  • Neuroscience
  • Visual Perception
  • Cognitive Science

Background:

  • The human visual system often perceives continuous shape change (transformational apparent motion, TAM) rather than discrete shifts.
  • This illusory perception is guided by shape-based rules for figure segmentation and self-matching across scenes.
  • TAM perception relies on the interaction between form and motion processing neural circuits.

Purpose of the Study:

  • To investigate the neural basis of transformational apparent motion (TAM).
  • To provide the first fMRI evidence for the interaction between form and motion processing areas during TAM perception.

Main Methods:

  • Functional magnetic resonance imaging (fMRI) was used to study brain activity in 19 participants.
  • Participants viewed stimuli designed to elicit TAM and control stimuli.

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  • Specific brain regions, including retinotopic areas, hMT+, and LOC, were mapped in a subset of subjects.

    • Main Results:

    • Increased Blood-Oxygen-Level-Dependent (BOLD) response was observed in V1, subsequent retinotopic areas, hMT+, and LOC during TAM perception compared to the control condition.
    • These findings suggest that form processing areas interact with motion-sensitive areas like hMT+ to construct the perception of moving figures.

    Conclusions:

    • The study provides the first neuroimaging evidence supporting the interaction between form and motion processing in the brain during TAM.
    • This interaction is crucial for the construction of perceived continuous motion from discrete changes.