Selectivity for polar, hyperbolic, and cartesian gratings in macaque visual cortex

Jack L. Gallant, Jochen Braun, David C. Van Essen

Research output: Contribution to journalArticlepeer-review

423 Scopus citations


The neural basis of pattern recognition is a central problem in visual neuroscience. Responses of single cells were recorded in area V4 of macaque monkey to three classes of periodic stimuli that are based on spatial derivative operators: polar (concentric and radial), hyperbolic, and conventional sinusoidal (Cartesian) gratings. Of 118 cells tested, 16 percent responded significantly more to polar or hyperbolic (non-Cartesian) gratings than to Cartesian gratings and only 8 percent showed a significant preference for Cartesian gratings. Among cells selective for non-Cartesian gratings, those that preferred concentric gratings were most common. Cells selective for non-Cartesian gratings may constitute an important intermediate stage in pattern recognition and the representation of surface shape.

Original languageEnglish
Pages (from-to)100-103
Number of pages4
Issue number5091
StatePublished - 1993


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