Retinal Projections
Mostrando 1-12 de 23 artigos, teses e dissertações.
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1. Caracterização citoarquitetônica, neuroquímica e de aferência óptica do complexo parabraquial do sagui (Callithrix jacchus)
The parabrachial complex (PB) is an area of the brainstem responsible for the processing and transmission of essential physiologic information for the survival of the organisms. This region is subdivided in approximately nine subregions, considering morphology, cytoarchitectural and functional characteristic. Its neurons have an extensive network of connecti
Publicado em: 2010
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2. A Zona Incerta no sagüi (Callithrix jacchus): Análise Citoarquitetônica, Neuroquímica e Projeção Retiniana
The retinal projections in mammals usually reach, classically, three major functional systems: the primary visual system, the accessory optic system, and the circadian timing system. But the retinal projections also reach areas classically considered non-visual, one of which groups the neurons of the zona incerta (ZI), target this study. The primary visual s
Publicado em: 2008
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3. Cytoarchitectural and immunohistochemical analysis of the visual system of tuffed capuchin (Cebus apella). / Análise citoarquitetônica e imunoistoquímica de estruturas do sistema visual de macacos-prego (Cebus apella)
O estudo do sistema visual de macacos-prego representa importante questão devido ao aspecto evolutivo que a espécie apresenta. Foram utilizados cinco macacos-prego, 2 kg. Foi efetuda injeção intra-ocular de 100 ml de solução aquosa de toxina colérica subunidade B (CTb) a 1%, sendo a perfusão realizada 15 dias após a injeção int
Publicado em: 2008
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4. Post-natal development of the retinal and cerebellar projections onto the lateral suprasylvian area in the cat.
1. Post-natal development of the retinal and cerebellar projections onto the medial bank of the lateral suprasylvian visual area was examined by using the field potential method and, additionally, by the orthograde horseradish peroxidase method. 2. Optic nerve stimulation elicited a surface-positive, depth-negative field potential in the medial bank of the l
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5. Surgically created neural pathways mediate visual pattern discrimination
Combined lesions of retinal targets and ascending auditory pathways can induce, in developing animals, permanent retinal projections to auditory thalamic nuclei and to visual thalamic nuclei that normally receive little direct retinal input. Neurons in the auditory cortex of such animals have visual response properties that resemble those of neurons in
The National Academy of Sciences.
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6. Targeted Disruption of Aldh1a1 (Raldh1) Provides Evidence for a Complex Mechanism of Retinoic Acid Synthesis in the Developing Retina
Genetic studies have shown that retinoic acid (RA) signaling is required for mouse retina development, controlled in part by an RA-generating aldehyde dehydrogenase encoded by Aldh1a2 (Raldh2) expressed transiently in the optic vesicles. We examined the function of a related gene, Aldh1a1 (Raldh1), expressed throughout development in the dorsal retina. Raldh
American Society for Microbiology.
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7. Axon substitution in the reorganization of developing neural connections.
Insights into the mechanisms of normal and pathological neural development may be gained by studying the reorganization of developing neural connections, caused experimentally or by disease. Many reorganized connections are assumed to arise by the anomalous stabilization of transient connections that occur during normal development. We report that, although
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8. Organization of pioneer retinal axons within the optic tract of the rhesus monkey.
Retinal ganglion cell axons must make a decision at the embryonic optic chiasm to grow into the appropriate optic tract. To gain insight into the cues that play a role in sorting out the crossed from the uncrossed optic axons, we investigated the sequence of their initial ingrowth in rhesus monkey embryos. Two carbocyanine dyes, 1,1'-dioctadecyl-3,3,3',3'-te
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9. Early divergence of magnocellular and parvocellular functional subsystems in the embryonic primate visual system
In both human and Old World primates visual information is conveyed by two parallel pathways: the magnocellular (M) and parvocellular (P) streams that project to separate layers of the lateral geniculate nucleus and are involved primarily in motion and color/form discrimination. The present study provides evidence that retinal ganglion cells in the macaque m
The National Academy of Sciences of the USA.
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10. Range image statistics can explain the anomalous perception of length
A long-standing puzzle in visual perception is that the apparent extent of a spatial interval (e.g., the distance between two points or the length of a line) does not simply accord with the length of the stimulus but varies as a function of orientation in the retinal image. Here, we show that this anomaly can be explained by the statistical relationship betw
The National Academy of Sciences.
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11. Visual responses of neurons in somatosensory cortex of hamsters with experimentally induced retinal projections to somatosensory thalamus.
These experiments investigate the capacity of thalamic and cortical structures in a sensory system to process information of a modality normally associated with another system. Retinal ganglion cells in newborn Syrian hamsters were made to project permanently to the main thalamic somatosensory (ventrobasal) nucleus. When the animals were adults, single unit
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12. Early discordant binocular vision disrupts signal transfer in the lateral geniculate nucleus.
The mammalian lateral geniculate nucleus (LGN) is known to regulate signal transfer from the retina to the brain neocortex in a highly complex manner. Besides inputs from the brainstem, extraretinal inputs via corticogeniculate projections and local inhibitory neurons modulate signal transfer in the LGN. However, very little is known about whether the postna