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Investigation of corticotectal and corticopretectal projections in rabbits reveals specific orientations of cortical areas.
A lesion was produced in the cerebral cortex in each of 10 rabbits killed 7–10 days post‐operatively. Alternate Nauta Gygax and Nissl series of each brain stem provided data on corticotectal and corticopretectal projections of the cortex. Seven cortical areas as described by M. Rose were investigated. Six areas were found to have no representation in the tectal and pretectal nuclei. Parictal Area 3 is represented ipsilaterally in the superior colliculus, nucleus pretectalis anterior, nucleus pretectalis posterior, and nucleus tractus opticus. The topographical orientation of this cortex is preserved with the lateral sectors of the cortex being represented restrally and the medical sector, caudally in the superior colliculus. The orientation is less precise in the nuclei pretectalis anterior and posterior in which the caudal sections of the cortex are represented laterally and the lateral sectors, dorsally.
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Guthrie et al. (1969) studied this question.
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