Fly Visual System
Mostrando 1-11 de 11 artigos, teses e dissertações.
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1. Acuidade visual e codificação neural da mosca Chrysomya megacephala / Visual acuity and neural encoding of the fly Chrysomya megacephala
Descrevemos os processos de captura, criação e micromanipulação cirúrgica das moscas Chrysomya megacephala. Apresentamos os processos de geração de estímulo e registro da atividade dos dois neurônios H1 localizados na placa lobular de seu cérebro. Um primeiro resultado apresentado refere-se a acuidade de seu sistema visual. Desenvolvemos um procedi
Publicado em: 2010
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2. Translação e rotação: processamento de informação no sistema visual da mosca / Translation and rotation: information processing in the fly visual system
Os animais utilizam, entre outras coisas, a informação visual que chega na forma de padrões do fluxo óptico para se locomover, desviar de obstáculos, localizar um predador ou uma presa. Esta informação permite ao animal estimar seu próprio movimento e o movimento de outros objetos no campo visual. Nós usamos a mosca como modelo para estudar como um
Publicado em: 2005
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3. Spikelet: uma nova transformada wavelet aplicada ao reconhecimento digital de padrões, em tempo real, de spikes e overlaps em sinais neurofisiológicos do campo visual da mosca / Spikelet: a novel wavelet-transform applied to digital, real-time, spike and overlap pattern recognition in neurophysiological signal of the fly´s visual system
A presente tese descreve a construção de uma nova transformada wavelet, aqui chamada de SPIKELET, que, combinada com um algoritmo proposto, é aplicada no reconhecimento computacional de padrões em spikes (picos) e spikes sobrepostos (overlaps) encontrados no sinal digitalizado correspondente às reações do neurônio H1 do cérebro de uma mosca de ordem
Publicado em: 2003
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4. In vivo imaging of calcium accumulation in fly interneurons as elicited by visual motion stimulation.
The computation of motion plays a central role in visual orientation. The fly has been successfully used as a model system for analyzing the mechanisms underlying motion detection. Thereby, much attention has been paid to a neuronal circuit of individually identifiable neurons in the third visual ganglion that extracts different types of retinal motion patte
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5. A simple chemosensory response in Drosophila and the isolation of acj mutants in which it is affected.
Although the Drosophila visual system has been described extensively, little is known about its olfactory system. A major reason for this discrepancy has been the lack of simple, reliable means of measuring response to airborne chemicals. This paper describes a jump response elicited by exposing Drosophila to chemical vapors. This behavior provides the basis
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6. Visually Mediated Odor Tracking During Flight in Drosophila
Flying insects use visual cues to stabilize their heading in a wind stream. Many animals additionally track odors carried in the wind. As such, visual stabilization of upwind tracking directly aids in odor tracking. But do olfactory signals directly influence visual tracking behavior independently from wind cues? Additionally, recent advances in olfactory mo
MyJove Corporation.
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7. Seasonal behavior in Drosophila melanogaster requires the photoreceptors, the circadian clock, and phospholipase C
Drosophila melanogaster locomotor activity responds to different seasonal conditions by thermosensitive regulation of splicing of a 3′ intron in the period mRNA transcript. Here we demonstrate that the control of locomotor patterns by this mechanism is primarily light-dependent at low temperatures. At warmer temperatures, when it is vitally important for t
National Academy of Sciences.
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8. Direction selectivity of blowfly motion-sensitive neurons is computed in a two-stage process.
Direction selectivity of motion-sensitive neurons is generally thought to result from the nonlinear interaction between the signals derived from adjacent image points. Modeling of motion-sensitive networks, however, reveals that such elements may still respond to motion in a rather poor directionally selective way. Direction selectivity can be significantly
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9. Genetic Analysis of Mutations at the GLUED Locus and Interacting Loci in DROSOPHILA MELANOGASTER
A genetic analysis of the dominant mutation Glued that perturbs the development of the normal axonal architecture of the fly's visual system was undertaken. Ten new alleles at this locus were identified and characterized. Two complementation groups that were identified failed to complement the original allele, suggesting that it is a double mutant or that it
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10. Mosaic Analysis Gives an Estimate of the Extent of Genomic Involvement in the Development of the Visual System in Drosophila Melanogaster
To investigate the role of vital loci in the development of the visual system of Drosophila, we induced mitotic recombination in individuals heterozygous for recessive organismal lethals and selected for analysis the resulting mosaics with homozygous mutant eye clones. Heads bearing clones were serially sectioned, silver-stained and examined for aberrations
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11. TAK1 Participates in c-Jun N-Terminal Kinase Signaling during Drosophila Development
Transforming growth factor β (TGF-β)-activated kinase 1 (TAK1) is a member of the MAPKKK superfamily and has been characterized as a component of the TGF-β/bone morphogenetic protein signaling pathway. TAK1 function has been extensively studied in cultured cells, but its in vivo function is not fully understood. In this study, we isolated a Drosophila hom
American Society for Microbiology.