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- W2124908511 abstract "This report describes the effects of stationary retinal patterns of light upon the behaviour of single neurons in the cat’s primary visual cerebral cortex. Records were obtained with extracellular microelectrodes from 20 neurons in the neurologically isolated forebrains of 11 cats. Black and white patterns were projected upon a translucent pearl-glass screen, and were focused upon the animal’s retinae through 10D spectacle lenses and optically neutral contact glasses. The stationary pattern was a straight light-dark edge. Experiments tested the effects of this stationary pattern upon both the frequency of spontaneous discharge and upon responses to a neighbouring mobile pattern. The mobile pattern consisted of a parallel thin white line passing through the neuron’s receptive field and provided with a rectangular oscillation of about 10´ amplitude and frequency of 2.5 Hz . Stationary patterns rarely produced any detectable modification of spontaneous discharge. Occasionally, however, such patterns produced a measurable change in the mean frequency of firing, which was greatest when the pattern crossed the edge of the receptive field. In contrast, stationary patterns almost invariably modified the responses of neurons to a neighbouring mobile pattern. This effect of the stationary pattern was as great when both patterns fell upon different retinae as when stationary and mobile patterns were projected upon the same retina. It proved impossible to account for these results as the consequence of either inadequate light-adaptation or inadequate retinal stability of the stationary pattern. The results show that the steady discharge of retinal ganglion cells which is continually related to stationary retinal illumination (Kuffier, Fitzhugh & Barlow 1956) reaches the cerebral cortex. This input to the cortex is too weak to drive cortical neurons, but is sufficient to modify their responses to more powerful stimuli. If properties of the human visual system are similar to those described here for the cat, some aspects of stabilized retinal images as observed by human subjects could be explained." @default.
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- W2124908511 date "1971-06-15" @default.
- W2124908511 modified "2023-09-24" @default.
- W2124908511 title "The effects of stationary retinal patterns upon the behaviour of neurons in the cat’s visual cortex" @default.
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- W2124908511 doi "https://doi.org/10.1098/rspb.1971.0052" @default.
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