title: Efferent projections of the pigeon intergeniculate leaflet containing neuropeptide Y.
abstract: The present study was preformed to map efferent projections of the pigeon intergeniculate leaflet (IGL) to other visual structures, with emphasis on the pathways containing neuropeptide Y (NPY). After injections of an anterograde tracer (Phaseolus vulgaris leucoagglutinin) into the IGL, labeled axons and presumptive terminals were seen in several retinorecipient and visually-related nuclei. All such areas contained immunoreactive fibers to antibodies against NPY. Electrolytic lesion of the IGL provoked a marked reduction in the number of NPY-labeled fibers in these visual structures. The data suggest that the IGL is the source of NPY-labeled axons which occur in many visual nuclei of the pigeon brain.
authors.affiliation: Departamento de Fisiologia e Biofísica, Universidade de São Paulo, Brasil.
authors.forename: D E
authors.initials: DE
authors.lastname: Hamassaki
authors.forename: L R
authors.initials: LR
authors.lastname: Britto
mesh_terms: D000818:Animals; D001931:Brain Mapping; D010856:Columbidae; D005829:Geniculate Bodies / Q000502:physiology*; D009474:Neurons / Q000502:physiology; D009478:Neuropeptide Y / Q000378:metabolism*; D010835:Phytohemagglutinins / Q000494:pharmacology*; D014795:Visual Pathways / Q000502:physiology*
chemical_list: D009478:Neuropeptide Y; D010835:Phytohemagglutinins; C100156:leukoagglutinins, plants