title: Cardinal difference between the orientation-selective retinal ganglion cells projecting to the fish tectum and the orientation-selective complex cells of the mammalian striate cortex.
abstract: Responses from two types of orientation-selective units of retinal origin were recorded extracellularly from their axon terminals in the medial sublaminae of tectal retinorecipient layer of immobilized cyprinid fish Carassius gibelio. Excitatory and inhibitory interactions in the receptive field were analyzed with two narrow stripes of optimal orientation flashing synchronously, one in the center and the other in different parts of the periphery. The general pattern of results was that the influence of the remote peripheral stripe was inhibitory, irrespective of the polarity of each stripe (light or dark). In this regard, the orientation-selective ganglion cells of the fish retina differ from the classical orientation-selective complex cells of the mammalian cortex, where the remote paired stripes of the opposite polarity (one light and one dark) interact in a facilitatory fashion. The consequence of these differences may be a weaker lateral inhibition in the latter case in response to stimulation by periodic gratings, which may contribute to a better spatial frequency tuning in the visual cortex.
authors: Institute for Information Transmission Problems Russian Academy of Sciences Bolshoi, Moscow, Russia. damjanov@iitp.ru
authors: Ilija
authors: I
authors: Damjanović
authors: Elena
authors: E
authors: Maximova
authors: Paul
authors: P
authors: Maximov
authors: Vadim
authors: V
authors: Maximov
mesh_terms: D000200:Action Potentials / Q000502:physiology; D000818:Animals; D005399:Fishes; D007839:Functional Laterality; D009949:Orientation / Q000502:physiology*; D010775:Photic Stimulation; D012165:Retinal Ganglion Cells / Q000502:physiology*; D011984:Sensory Receptor Cells / Q000502:physiology*; D013477:Superior Colliculi / Q000502:physiology*; D014793:Visual Cortex / Q000166:cytology*; D014794:Visual Fields / Q000502:physiology; D014795:Visual Pathways / Q000502:physiology; D014796:Visual Perception / Q000502:physiology*