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Visualizing Motion Patterns in Acupuncture Manipulation
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Columnar clusters in the human motion complex reflect consciously perceived motion axis.

Marian Schneider1, Valentin G Kemper2, Thomas C Emmerling2

  • 1Department of Cognitive Neuroscience, Faculty of Psychology and Neuroscience, Maastricht University, 6229 ER Maastricht, The Netherlands; marian.schneider@maastrichtuniversity.nl r.goebel@maastrichtuniversity.nl.

Proceedings of the National Academy of Sciences of the United States of America
|February 28, 2019
PubMed
Summary
This summary is machine-generated.

Human brain activity in specialized neuron clusters tracks conscious visual motion perception. Researchers found distinct neural responses correlating with perceived horizontal or vertical motion, even when visual input was ambiguous.

Keywords:
7-tesla MRIapparent motioncolumnar fMRImultistable perceptionneural correlates of consciousness

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Area of Science:

  • Neuroscience
  • Cognitive Science
  • Neuroimaging

Background:

  • Conscious experience is linked to specialized neural activity in the cerebral cortex.
  • Understanding how the brain represents specific conscious percepts, like visual motion, is a key challenge.

Purpose of the Study:

  • To investigate if the conscious perception of visual motion axis correlates with neural activity.
  • To test the hypothesis that direction-selective neuronal clusters in the human motion complex reflect specific motion percepts.

Main Methods:

  • Utilized submillimeter functional Magnetic Resonance Imaging (fMRI) at ultrahigh field (7 Tesla).
  • Identified fine-grained neuronal clusters tuned to horizontal or vertical motion using unambiguous stimuli.
  • Recorded cluster responses during ambiguous apparent motion perception while subjects reported their percepts.

Main Results:

  • Identified distinct horizontal and vertical motion-selective clusters in the human motion complex.
  • Observed dissociative changes in cluster response amplitudes corresponding to subjective shifts between horizontal and vertical motion percepts.
  • Found a columnar organization of motion preference, stable with cortical depth but changing along the cortical surface.

Conclusions:

  • Activity within specialized neuronal clusters in the human motion complex is dynamically linked to conscious visual motion perception.
  • These findings suggest that specific neural populations track distinct conscious experiences of motion axis.
  • The columnar organization supports the idea of specialized processing modules for motion direction.