Thalamic projections to layer I of striate cortex shown by retrograde transport of horseradish peroxidase

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Science  09 Feb 1979:
Vol. 203, Issue 4380, pp. 556-559
DOI: 10.1126/science.760205


The diffusion of horseradish peroxidase was restricted to layers I and II of the striate cortex in Tupaia glis and Galago senegalensis. In the lateral geniculate body of Tupaia labeled cells were found only in layer 3; some labeled cells were also found in the lateral nucleus. In Galago labeled cells were found only in layers 4 and 5 of the lateral geniculate body; a band of cells was also found in the pulvinar nucleus. These results support the distinction between two overlapping thalamic systems, a layer I and a layer IV system.