Neural population tuning links visual cortical anatomy to human visual perception.
Bottom Line: We found that visual cortical thickness correlated negatively with the sharpness of neural population tuning and the accuracy of perceptual discrimination at different visual field positions.In contrast, visual cortical surface area correlated positively with neural population tuning sharpness and perceptual discrimination accuracy.Our findings reveal a central role for neural population tuning in linking visual cortical anatomy to visual perception and suggest that a perceptually advantageous visual cortex is a thinned one with an enlarged surface area.
Affiliation: Institute of Cognitive Neuroscience, University College London, 17 Queen Square, London WC1N 3AR, UK; Wellcome Trust Centre for Neuroimaging, University College London, 12 Queen Square, London WC1N 3BG, UK. Electronic address: email@example.com.Show MeSH
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Mentions: As variability in the position tuning width and position discrimination threshold consisted of both eccentricity-independent and eccentricity-dependent components, we conducted separate analyses to explore the influences that visual cortical anatomy exerted on these two components, respectively. To control for the factor of eccentricity and study the eccentricity-independent component, we analyzed the relationships between visual cortical anatomy, neural population tuning width, and perceptual acuity at a fixed visual field eccentricity (4.7 degree). Across a total of 20 participants and six visual field positions at 4.7 degree eccentricity, we plotted the position tuning width of V1 neural populations and position discrimination threshold of human participants, first against each other to address the behavioral significance of neural population tuning (Figure 3A) and then against thickness or surface area of V1 to address the functional impacts of visual cortical anatomy (Figures 3B and 3C).
Affiliation: Institute of Cognitive Neuroscience, University College London, 17 Queen Square, London WC1N 3AR, UK; Wellcome Trust Centre for Neuroimaging, University College London, 12 Queen Square, London WC1N 3BG, UK. Electronic address: firstname.lastname@example.org.