Serotonergic afferents of the pigeon accessory optic nucleus.
Injections of a retrograde tracer into the accessory optic nucleus of the basal optic root (nBOR) of the pigeon, combined with 5-HT immunochemistry, revealed that serotonergic projections to the nBOR appeared to originate mainly from the median (MR) and paramedian (PMR) raphe nuclei. These projections were confirmed by the significant decrease in 5-HT immunoreactivity observed in nBOR after lesions in MR and PMR. These data characterize distinct sources of 5-HT innervation to the pigeon nBOR and suggest that those afferents could represent part of a modulatory system that contributes to the role of the nBOR in optokinetic mechanisms.
Toledo
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CA
Department of Physiological Sciences, Federal University of Santa Catarina, Brazil.
Hamassaki-Britto
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DE
Britto
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LR
D000818:Animals; D010856:Columbidae; D007150:Immunohistochemistry; D008845:Microinjections; D008863:Microspheres; D009474:Neurons / Q000737:chemistry; D009900:Optic Nerve / Q000737:chemistry*; D012235:Rhodamines; D012701:Serotonin / Q000032:analysis*; D013477:Superior Colliculi / Q000737:chemistry / Q000166:cytology*; D014795:Visual Pathways
D012235:Rhodamines; D012701:Serotonin