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- W4251312330 abstract "Orthograde and retrograde tracers were used to examine subcortical connections of neurons in the neurological mutant tish rat. This animal exhibits bilateral heterotopia similar to those observed in epileptic humans with subcortical band heterotopia. Terminal varicosities were labeled in the striatum, thalamus, brainstem, and spinal cord following injections of the anterograde tracer biotinylated dextran amine (BDA) into the heterotopic cortex. The general topography of corticothalamic projections was evaluated by injecting the retrograde tracer Fluoro-Gold (FG) into ventral thalamic nuclei. Retrograde labeling of small-to-medium sized neurons was observed in layer VI of topographically restricted portions of the normotopic cortex. Similar appearing cells were labeled in the neighboring portions of the underlying heterotopia; however, these neurons did not display characteristic lamination or radial orientation. Thalamocortical terminals labeled by injecting BDA into the ventroposterolateral nucleus (VPL) were observed primarily in layer IV of the medial aspect of the normotopic somatosensory cortex. In contrast, a radial column of terminals was present in the underlying heterotopia. Typical barrel labeling was found in the lateral aspect of the normotopic somatosensory cortex after injecting the ventroposteromedial nucleus (VPM), whereas more diffuse patches of labeling were observed in the underlying heterotopia. Heterotopic neurons in the tish cortex, thus, exhibit characteristic features of subcortical connectivity. Both normotopic and heterotopic neurons in the tish brain project to appropriate subcortical sites and establish bidirectional topographic connections with the thalamus. These results suggest that primary sensory-motor information is represented in a parallel manner in the normotopic and heterotopic cortices of the tish rat. J. Comp. Neurol. 395:29–42, 1998. © 1998 Wiley-Liss, Inc." @default.
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- W4251312330 date "1998-05-25" @default.
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- W4251312330 title "Subcortical connections of normotopic and heterotopic neurons in sensory and motor cortices of the tish mutant rat" @default.
- W4251312330 doi "https://doi.org/10.1002/(sici)1096-9861(19980525)395:1<29::aid-cne3>3.3.co;2-6" @default.
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