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Auditory and visual attention modulate motion processing in area MT+.

Rebecca A Berman1, Carol L Colby

  • 1Department of Neuroscience and Center for the Neural Basis of Cognition, University of Pittsburgh, 115 Mellon Institute, 4400 5th Ave, Pittsburgh, PA 15213, USA. reberman@cnbc.cmu.edu

Brain Research. Cognitive Brain Research
|June 14, 2002
PubMed
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Auditory attention, like visual attention, can influence early visual processing. This study found that both visual and auditory attention tasks reduced the motion aftereffect and brain activity in human area MT+.

Area of Science:

  • Neuroscience
  • Cognitive Science
  • Visual Perception

Background:

  • Visual attention modulates early visual processing.
  • The influence of auditory attention on visual processing remains less understood.

Purpose of the Study:

  • To investigate whether auditory attention affects visual motion processing.
  • To compare the effects of visual and auditory attention on the motion aftereffect (MAE) and neural activity in human area MT+.

Main Methods:

  • Utilized psychophysical and functional magnetic resonance imaging (fMRI) to measure MAE duration, neural decay time, and MT+ activation.
  • Subjects performed visual or auditory attentional tasks during motion adaptation to expanding stimuli.

Main Results:

Related Experiment Videos

  • Both visual and auditory attention tasks significantly reduced MAE perception and MT+ decay times.
  • Attentional tasks also decreased the magnitude of MT+ activation during motion adaptation.
  • MAE was perceived after adapting to expanding but not reversing motion.

    • Conclusions:

    • Auditory attention, similar to visual attention, can modulate sensory processing in early visual areas.
    • Attentional mechanisms influence motion perception and neural responses in human area MT+.