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 immunohistochemistry, revealed that serotonergic projections to the nBOR appeared to originate mainly from the median (MR) and paramedian (PMR) raphe nuclei. These proj...

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Bibliographic Details
Published in:Brain research 1995-12, Vol.705 (1), p.341-344
Main Authors: Toledo, Cláudio A.B., Hamassaki-Britto, Daˆnia E., Britto, Luiz R.G.
Format: Article
Language:English
Subjects:
Accessory optic system
Animals
Biological and medical sciences
Columbidae
Eye and associated structures. Visual pathways and centers. Vision
Fundamental and applied biological sciences. Psychology
Immunohistochemistry
Microinjections
Microspheres
Neurons - chemistry
Nucleus of the basal optic root
Optic Nerve - chemistry
Rhodamines
Serotonin
Serotonin - analysis
Subcortical visual pathways
Superior Colliculi - chemistry
Superior Colliculi - cytology
Vertebrates: nervous system and sense organs
Visual Pathways
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Summary:Injections of a retrograde tracer into the accessory optic nucleus of the basal optic root (nBOR) of the pigeon, combined with 5-HT immunohistochemistry, 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.
ISSN:0006-8993
1872-6240
DOI:10.1016/0006-8993(95)01243-5