Central control of melanotrope cells of XXXX .

@entity1238 @entity1246 @entity935 @entity22847 @entity1063 @entity73331
Our research focusses on the role of brain and hypophysis in the control of background adaptation in the clawed toad, @entity1238 . This adaptation is regulated by @entity22847 ( @entity22847 ). Previously, it was shown that various neurotransmitters influence @entity22847 release. Here we report about the origin of these factors. Using retrograde labelling techniques combined with immunocytochemistry, it was found that the inhibitory transmitters @entity935 and neuropeptide Y coexist in neurons in the suprachiasmatic nucleus. These neurons project to the pars intermedia and synaptically contact the @entity22847 -producing melanotrope cells. In the synapses also @entity1246 is present. Tracing of the optic nerve indicated the presence of a direct retinosuprachiasmatic tract. Furthermore, locus coeruleus neurons project to the pars intermedia. They contain the inhibitory transmitter @entity1063 . The stimulatory factors @entity73331 and thyrotropin stimulating hormone originate from the magnocellular nucleus which send its processes to the neural lobe of the hypophysis.
