title: Color properties of the motion detectors projecting to the goldfish tectum: II. Selective stimulation of different chromatic types of cones.
abstract: Sensitivity to the sign of contrast of direction-selective (DS) and orientation-selective (OS) ganglion cells (GCs) was investigated with selective stimulation of different chromatic types of cones. It was shown that the DS GCs that were classified with the use of achromatic stimuli as belonging to the ON type responded to selective stimulation of the long-wave cones as the ON type also, while the stimulation of middle-wave or short-wave cones elicited the OFF type responses. Character of the responses of DS GCs of the OFF type was exactly the opposite. OS GCs, which responded to achromatic stimuli as the ON-OFF type, responded to selective stimulation of the long-wave cones as the ON-OFF type as well, responded to middle-wave stimulation as the OFF type and to stimulation of short-wave cones it responded mainly as the ON type. At the same time, under color-selective stimulation, both DS and OS GCs retained the directional and orientation selectivity with the same preferred directions. The results obtained are in favor of the idea that the signals from the different chromatic types of cones are combined in the outer synaptic layer of the retina at the inputs of bipolar cells using sign-inverting and/or sign-conserving synapses, while specific spatial properties of motion detectors are formed in the inner synaptic layer.
authors.affiliation: Institute for Information Transmission Problems, Russian Academy of Sciences, Bolshoi Karetny Per., 19, Moscow 127994 GSP-4, Russia.
authors.forename: Vadim
authors.initials: V
authors.lastname: Maximov
authors.forename: Elena
authors.initials: E
authors.lastname: Maximova
authors.forename: Ilija
authors.initials: I
authors.lastname: Damjanović
authors.forename: Alexey
authors.initials: A
authors.lastname: Aliper
authors.forename: Paul
authors.initials: P
authors.lastname: Maximov
mesh_terms: D000200:Action Potentials / Q000502:physiology; D000818:Animals; D001703:Biophysics; D003118:Color Perception / Q000502:physiology; D055253:Color Vision / Q000502:physiology*; D006054:Goldfish; D009039:Motion Perception / Q000502:physiology*; D009949:Orientation; D010775:Photic Stimulation; D012160:Retina / Q000166:cytology; D017949:Retinal Cone Photoreceptor Cells / Q000502:physiology*; D017603:Signal Detection, Psychological; D003336:Tectum Mesencephali / Q000502:physiology*; D014795:Visual Pathways / Q000502:physiology*
keywords: Goldfish; color vision; direction selectivity; ganglion cells; motion detectors; orientation selectivity; retina; tectum opticum