title: Discrete retinal input to the parabrachial complex of a new-world primate, the common marmoset (Callithrix jacchus).
abstract: Traditional retinal projections target three functionally complementary systems in the brain of mammals: the primary visual system, the visuomotor integration systems and the circadian timing system. In recent years, studies in several animals have been conducted to investigate the retinal projections to these three systems, despite some evidence of additional targets. The aim of this study was to disclose a previously unknown connection between the retina and the parabrachial complex of the common marmoset, by means of the intraocular injection of cholera toxin subunit b. A few labeled retinal fibers/terminals that are detected in the medial parabrachial portion of the marmoset brain show clear varicosities, suggesting terminal fields. Although the possible role of these projections remains unknown, they may provide a modulation of the cholinergic parabrachial neurons which project to the thalamic dorsal lateral geniculate nucleus.
authors.affiliation: Laboratory of Chronobiology, Biosciences Center, Federal University of Rio Grande do Norte, 59072-970 Natal-RN, Brazil.
authors.forename: Rovena Clara Galvão Januário
authors.initials: RC
authors.lastname: Engelberth
authors.forename: André Luíz Bezerra
authors.initials: AL
authors.lastname: de Pontes
authors.forename: Rayane Bartira Silva
authors.initials: RB
authors.lastname: do Nascimento
authors.forename: Ruthnaldo Rodrigues Melo
authors.initials: RR
authors.lastname: de Lima
authors.forename: Raissa Rodrigues
authors.initials: RR
authors.lastname: de Lima
authors.forename: Cláudio Antonio Barbosa
authors.initials: CA
authors.lastname: de Toledo
authors.forename: Miriam Stela Maris
authors.initials: MS
authors.lastname: de Oliveira Costa
authors.forename: Luiz Roberto Giorgetti
authors.initials: LR
authors.lastname: Britto
authors.forename: Jeferson
authors.initials: J
authors.lastname: de Souza Cavalcante
mesh_terms: D000818:Animals; D002144:Callithrix / Q000033:anatomy & histology*; D007150:Immunohistochemistry; D008297:Male; D011149:Pons / Q000166:cytology*; D012160:Retina / Q000166:cytology*; D014795:Visual Pathways / Q000166:cytology*