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Population coding of orientation in the visual cortex of alert cats: an information theoretic analysis

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K, & K, H. (2004). Population coding of orientation in the visual cortex of alert cats: an information theoretic analysis. NeuroReport, 15(18), 2761-2764. Retrieved from http://journals.lww.com/neuroreport/pages/articleviewer.aspx?year=2004issue=12220article=00014type=abstract.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0013-D73F-2
Abstract
We studied the encoding of stimulus orientation in the visual cortex of alert animals using information theoretic methods. Based on a ‘labeled-line’ code, the encoding of orientation was mostly synergistic and only few pairs coded redundant. The synergy contributed about 20 of the information and was strongest for sites with distinct tuning curves. A recently proposed decomposition of synergy revealed that redundancy introduced by common tuning preferences is more than just compensated by noise correlations which mostly contributed synergistically. Based on a pooled response code the contribution of noise correlations diminished resulting in a severe information loss. Thus, to operate economically, cortical neurons should either employ a labeled-line code or, if using pooled responses, be highly selective in choosing afferents.