Columnar clusters in the human motion complex reflect consciously perceived motion axis.

ABSTRACT: The specific contents of human consciousness rely on the activity of specialized neurons in cerebral cortex. We hypothesized that the conscious experience of a specific visual motion axis is reflected in response amplitudes of direction-selective clusters in the human motion complex. Using submillimeter fMRI at ultrahigh field (7 T) we identified fine-grained clusters that were tuned to either horizontal or vertical motion presented in an unambiguous motion display. We then recorded their responses while human observers reported the perceived axis of motion for an ambiguous apparent motion display. Although retinal stimulation remained constant, subjects reported recurring changes between horizontal and vertical motion percepts every 7 to 13 s. We found that these perceptual states were di

SUBMITTER: Schneider M 

PROVIDER: S-EPMC6421420 | biostudies-literature | 2019 Mar

REPOSITORIES: biostudies-literature