File:Toad-NPY-2.png
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Toad-NPY-2.png (290 × 427 pixels, file size: 34 KB, MIME type: image/png)
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[edit]DescriptionToad-NPY-2.png |
English: Neurons of the optic tectum are integrated in a neural macro-network in which various forebrain structures are involved; see Vision in toads. The prey-selective responses of tectal T5.2 neurons are probably determined by postsynaptic inhibitory input of pretectal thalamic neurons (cf. lines with terminal dots). Furthermore, there is ample evidence suggesting that retino-tectal glutaminergic transfer is controlled by neuropeptide Y (NPY) -- released from the axonal terminals of pretectal thalamic TH3 neurons -- in a manner of presynaptic inhibition via Y2 receptors. Pretectal influences mediated by NPY are phylogenetically conserved properties in tetrapods. (Combined after Ewert 1974 and 2004) Deutsch: Neurone des Tectum opticum sind in einem neuralen Netzwerk integriert, an dem verschiedene Vorderhirnstrukturen beteiligt sind; s. Vision in toads. Die beuteselektiven Antworten von tectalen T5.2-Neuronen werden vermutlich durch postsynaptische hemmende Eingänge von praetectal thalamischen Neuronen bestimmt (s. Linien mit terminalen Punkten). Weiterhin gibt es hinreichende Beweise dafür, dass retino-tectaler glutaminerger Transfer kontrolliert wird durch Neuropeptid Y (NPY) -- freigesetzt von Axonterminalen von praetectal thalamischen TH3-Neuronen -- in Gestalt praesynaptischer Hemmung via Y2-Rezeptoren. Bei praetectalen, NPY-vermittelten Einflüssen handelt es sich um phylogenetisch konservierte Eigenschaften der Tetrapoden unter den Vertebraten. (Kombiniert nach Ewert 1974 und 2004) |
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Source | Own work |
Author | Egape13 |
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current | 09:39, 5 August 2011 | 290 × 427 (34 KB) | Egape13 (talk | contribs) |
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