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Summary
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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 probably result from 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 tetrapod vertebrates. (Combined after Ewert 1974 and 2004) Unknown 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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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 04:10, 6 August 2011 | | 419 × 571 (59 KB) | Egape13 |
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