ABSTRACT
In the higher visual areas of primates—the inferotemporal cortex (ITC) and the posterior parietal cortex (PPC)—information is transmitted in two ways: (a) from the geniculostriate cortex, and then further, via the prestriate cortex; and (b) via the superior colliculus, pulvinar, and, again, prestriate cortex (Fig. 6.1). We have already discussed two of the main tasks that are performed by the visual system: the recognition (classification) of objects and the description of spatial relations. The information used for recognition is transmitted using the first route, as shown in experiments in which recognition was lost following damage to the prestriate cortex of monkeys (Mishkin, 1982); damage to the pulvinar has no influence on recognition, however. Information about spatial organization is transmitted using both routes. Scheme of the morphological organization of the visual system of primates. (In constructing this scheme, heavy reliance has been placed on the works of van <xref ref-type="bibr" rid="ref380">Essen, 1979</xref>, and <xref ref-type="bibr" rid="ref227">Mansfield, 1980</xref>): R, retina; W, X, Y, axons of three types of ganglion cells; DLGN, dorsal LGN; FT, pretectum; SC, superior colliculus; PL, PI, lateral and inferior pulvinar; V<sub>1</sub>, striate cortex; V<sub>2</sub>, V<sub>3</sub>, V<sub>3A</sub>, V<sub>4</sub>, prestriate cortex; IT, inferior temporal cortex; FF, oculomotor eye fields; MT, posterior part of temporal sulcus; IPS(OA), region where V<sub>1</sub> is projected; IPS(PG), region projecting into ventral parietal lobule; TF, region on medial surface of temporal lobe adjoined to T; IPL(PgV), ventral parietal lobule corresponding to posterior part of Field 7. Reprinted with permission. https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9780203773932/8c07d8e9-164f-4b14-a1c4-8666af02ffcc/content/fig6_1_B.tif" xmlns:xlink="https://www.w3.org/1999/xlink"/>
