By Jonathan Stone

ISBN-10: 1468444336

ISBN-13: 9781468444339

ISBN-10: 1468444352

ISBN-13: 9781468444353

In the mid-sixties, John Robson and Christina Enroth-Cugell, with out figuring out what they have been doing, trigger a digital revolution within the learn of the visible approach. They have been attempting to follow the tools of linear platforms research (which have been already getting used to explain the optics of the attention and the psychophysical functionality of the human visible procedure) to the homes of retinal ganglion cells within the cat. Their thought was once to stimulate the retina with styles of stripes and to examine the best way that the signs from the guts and the adverse encompass of the respective box of every ganglion telephone (first defined by way of Stephen Kuffier) engage to generate the cell's responses. a few of the ganglion cells behaved themselves very properly and John and Christina bought into the behavior (they now say) of calling them I (interesting) cells. even if. to their annoyance, nearly all of neurons they recorded had nasty, nonlinear homes that could not be estimated at the foundation of straightforward summ4tion of sunshine in the middle and the encompass. those uncoop­ erative ganglion cells, which Enroth-Cugell and Robson firstly referred to as D (dull) cells, produced brief bursts of impulses each time the distribution of sunshine falling at the receptive box used to be replaced, whether the complete gentle flux used to be unaltered.

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Parallel Processing in the Visual System: The Classification of Retinal Ganglion Cells and its Impact on the Neurobiology of Vision

Within the mid-sixties, John Robson and Christina Enroth-Cugell, with out knowing what they have been doing, trigger a digital revolution within the research of the visible approach. They have been attempting to follow the equipment of linear platforms research (which have been already getting used to explain the optics of the attention and the psychophysical functionality of the human visible approach) to the houses of retinal ganglion cells within the cat.

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Additional resources for Parallel Processing in the Visual System: The Classification of Retinal Ganglion Cells and its Impact on the Neurobiology of Vision

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1970) that distinguished two groups of cat retinal ganglion cells: cells of one group (type I) gave phasic responses to stationary flashing stimuli, cells of the other group (type II) gave tonic responses. These response differences are shown in Fig. 5 (the legend to that figure describes the use of the terms tonic and phasic). The type I/type II distinction initially depended on the tonic/phasic criterion, but in 1971, Fukada added several observations, noting that type I cells tended to have faster axons (Fig.

Some degree of controversy has accompanied the development of these classifications. The controversy has not concerned whether groupings exist, or whether they are important; rather it has concerned the methodology of classification and, as a consequence, the number of groups considered to be present, the names given to them, and the functional significance attributed to them. 2) as "parametric" (such as the Y/X/W and a/{3/'Y schemes), as "feature extraction" classifications (such as the brisk/sluggish/sustained/transient/concentric/nonconcentric scheme), or as amalgams of the two.

The arrow points to the histogram obtained after we had set the disk to move horizontally through the center of the receptive field. The next histogram to the upper right was obtained for the disk moving horizontally half a degree higher, etc. Time in each histogram is directed to the lower right. As discussed in the text, this plot may alternatively be viewed as a map of the local response, at a certain instant, of similar off-center units at corresponding positions in this region of the retina to the movement of the disk as shown.

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Parallel Processing in the Visual System: The Classification of Retinal Ganglion Cells and its Impact on the Neurobiology of Vision by Jonathan Stone


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