The parabigeminogeniculate projection: connectional studies in eight mammals
| Autor: | D. P. Van Lieshout, Joseph T. Weber, John K. Harting, T. Hashikawa |
|---|---|
| Rok vydání: | 1991 |
| Předmět: |
Rodentia
Lateral geniculate nucleus Macaque Functional Laterality Midbrain Species Specificity Opossum Mesencephalon biology.animal Geniculate Neural Pathways Animals Saimiri Mammals biology General Neuroscience Superior colliculus Squirrel monkey Galago Geniculate Bodies Sciuridae Anatomy Opossums biology.organism_classification Retrograde tracing Rats Macaca fascicularis nervous system Cats Neuroscience |
| Zdroj: | The Journal of comparative neurology. 305(4) |
| ISSN: | 0021-9967 |
| Popis: | Anterograde and retrograde tracing methods have been used to analyze the origin and distribution of parabigeminogeniculate axons in the gray squirrel, the gopher, the rat, the opossum, the cat, the greater bushbaby, the squirrel monkey and the macaque monkey. Our findings reveal that parabigeminogeniculate axons most heavily innervate regions of the lateral geniculate that are also targeted by axons arising from the superior colliculus (tectogeniculate). These geniculate layers and zones of parabigeminal and tectal overlap contain small cells, and in several species are associated with the small W cell retino-geniculocortical pathway. In addition to the dense input to small-celled layers and zones, parabigeminal axons in several species also innervate regions of the lateral geniculate nucleus that are relatively free of tectogeniculate axons and that are associated with the medium (X) and large (Y) cell streams. Finally, our data reveal that the laterality of parabigeminogeniculate pathways varies across mammals, being primarily crossed in the gray squirrel, the gopher, the rat, and the opossum, bilateral in the cat, and primarily ipsilateral in the three primates. |
| Databáze: | OpenAIRE |
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