Spatial asymmetries in cat retinal ganglion cell responses

Abstract. Enroth-Cugell and Robson (1966) ®rst proposed a classi®cation of retinal ganglion cells into X cells, which exhibit approximate linear spatial summation and largely sustained responses, and Y cells, which exhibit nonlinearities and transient responses. Gaudiano (1992a, 1992b, 1994) has suggested that the dominant characteristics of both X and Y cells can be simulated with a single model simply by changing receptive ®eld pro®les to match those of the anatomical counterparts of X and Y cells. He also proposed that a signi®cant component of the spatial nonlinearities observed in Y (and sometimes X) cells can result from photoreceptor nonlinearities coupled with push-pull bipolar connections. Speci®cally, an asymmetry was predicted in the ganglion cell response to rectangular gratings presented at di€erent locations in the receptive ®eld under two

• Type: Journal
• Year: 1998
• Where: BC
• Authors: Paolo Gaudiano, Andrzej W. Przybyszewski, Richard J. A. van Wezel, Wim A. van de Grind
• Keywords: BC 1998, Ganglion Cell, Receptive ®eld, Retinal Ganglion Cells