Ettlinger at Bay: can visual agnosia be explained by low-level visual impairments?
The importance of the inferior temporal neocortex in visual discrimination learning and remembering in macaque monkeys was established in the 1950s by several investigators, including George Ettlinger. It is salutary to note that the importance of the ventral temporal lobe in vision was established by Ettlinger and his contemporaries long before extra-striate visual areas were known, as demonstrated electrophysiologically. Although the monkeys with inferotemporal or latero-ventral prestriate ablation were visually ‘agnosic’ their sensory status was resolutely normal, with the exception of chromatic discrimination, which is irrelevant to achromatic shape perception.
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