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Paper   IPM / Cognitive Sciences / 16777
School of Cognitive Sciences
  Title:   Dissociable Contribution of Extrastriate Responses to Representational Enhancement of Gaze Targets
1.  Y. Merrikhi
2.  M. Shams-Ahmar
3.  H. Karimi-Rouzbahani
4.  K. Clark
5.  R. Ebrahimpour
6.  B. Noudoost
  Status:   Published
  Journal: Journal of Cognitive Neuroscience
  No.:  10
  Vol.:  33
  Year:  2021
  Supported by:  IPM
Before saccadic eye movements, our perception of the saccade targets is enhanced. Changes in the visual representation of saccade targets, which presumably underlie this perceptual benefit, emerge even before the eye begins to move. This perisaccadic enhancement has been shown to involve changes in the response magnitude, selectivity, and reliability of visual neurons. In this study, we quantified multiple aspects of perisaccadic changes in the neural response, including gain, feature tuning, contrast response function, reliability, and correlated activity between neurons. We then assessed the contributions of these various perisaccadic modulations to the population's enhanced perisaccadic representation of saccade targets. We found a partial dissociation between the motor information, carried entirely by gain changes, and visual information, which depended on all three types of modulation. These findings expand our understanding of the perisaccadic enhancement of visual representations and further support the existence of multiple sources of motor modulation and visual enhancement within extrastriate visual cortex.

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