[Rhythmic activity in the retina of fish evoked by adequate stimulation].
Distribution of evoked rhythmical responses over the retinal surface and depth was investigated in carp and tench by recording the local electroretinogram and spike activity of ganglion cells. The dependence of the response amplitude-frequency characteristics upon the stimulus intensity and duration was also studied. The rhythmical responses to light "on" and "off" stimuli differed in a number of features, particularly in patterns of their distribution among cellular and synaptic retinal layers. It was found that frequency, amplitude and the number of waves in the response were functions of the stimulus parameters. The "on", "off" and "on-off" retinal ganglion cells were represented in the records. Their discharges corresponded to the wave phase angle close to pi/2. Blocking conduction in the optic nerve by cold made it possible to show that the retinal rhythmic activity system is independent of the centres although tonically influenced by them.
D000818:Animals; D002347:Carps / Q000502:physiology; D005071:Evoked Potentials; D005399:Fishes / Q000502:physiology*; D009407:Nerve Block; D009431:Neural Conduction; D009900:Optic Nerve / Q000502:physiology; D010507:Periodicity; D012160:Retina / Q000502:physiology*
Ritmicheskaia aktivnost' v setchatke ryb, vyzvannaia adekvatnoĭ stimuliatsieĭ