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| Houzel,J.-C.; Carvalho,M.L.; Lent,R.. |
| In the last five years, a number of detailed anatomical, electrophysiological, optical imaging and simulation studies performed in a variety of non-human species have revealed that the functional organization of callosal connections between primary visual areas is more elaborate than previously thought. Callosal cell bodies and terminals are clustered in columns whose correspondence to features mapped in the visual cortex, such as orientation and ocularity, are starting to be understood. Callosal connections are not restricted to the vertical midline representation nor do they establish merely point-to-point retinotopic correspondences across the hemispheres, as traditionally believed. In addition, anatomical studies have revealed the existence of an... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Corpus callosum; Visual cortex; Perceptual binding; Vertical midline; Orientation column; Binocular interactions. |
| Ano: 2002 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2002001200005 |
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| TENÓRIO,FRANK; GIRALDI-GUIMARÃES,ARTHUR; MENDEZ-OTERO,ROSALIA. |
| Nitric oxide has several biological roles and nitric oxide synthase (NOS) is expressed in the nervous system, and co-localizes with NADPH-diaphorase. The superficial layers of the superior colliculus (SC), which receive retinal and cortical inputs, present NADPH-d staining in a sub-population of neurons that include all cell types. We have previously shown, by NADPH-diaphorase, that eye enucleation alters the intracellular distribution of NOS. Here, we studied the effect of cortical ablation on NOS expression by neurons in collicular superficial layers. Our results show that cortical ablation alters the proportion of different NOS-positive cell types, but not the intracellular distribution of the enzyme. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Superior colliculus; Nitric oxide; Visual cortex; NADPH-diaphorase. |
| Ano: 2002 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652002000400008 |
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