ArticleThe Journal of neuroscience : the official journal of the Society for Neuroscience2022
Pattern Motion Direction Is Encoded in the Population Activity of Macaque Area MT.
Article in The Journal of neuroscience : the official journal of the Society for Neuroscience, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
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4 citing papers in PubMed.
- A modular neural circuit for computing the motion of objects.bioRxiv : the preprint server for biology · 2026Article
- Ocular-following responses to broadband visual stimuli of varying motion coherence.Journal of vision · 2024Article
- Transformation of Motion Pattern Selectivity from Retina to Superior Colliculus.The Journal of neuroscience : the official journal of the Society for Neuroscience · 2024Article
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3 authors.
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Abstract
Direction selective neurons in macaque primary visual cortex are narrowly tuned for orientation, and are thus afflicted by the aperture problem. At the next stage of motion processing, in the middle temporal (MT) area, some cells appear to solve this problem, responding to the pattern motion direction of plaids. Models have been proposed to account for this computation, but they do not replicate the diversity of responses observed in MT. We recorded from 386 cells in area MT of two male macaques, while presenting a wide range of random-line stimuli and their compositions into noise plaids. As we broadened the range of stimuli used to probe the cells, yielding ever more challenging conditions for extracting pattern motion, the diversity of the responses observed increased, and the fraction of cells that faithfully encoded pattern motion direction shrank. However, we show here that a pattern motion signal is present at the population level. We identified four mechanisms, one never proposed before, that together might account for the observed diversity in single-cell responses. Pattern motion is thus extracted in area MT, but it is encoded across the population, and not in a small subset of pattern neurons.
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