title: Calretinin labels a specific neuronal subpopulation in primate globus pallidus.
abstract: All pallidal neurones are believed to share the same chemical and morphological phenotype in primates. At variance with this idea is the present finding that calretinin (CR), a calcium binding protein, occurs only in a subset of pallidal neurones in squirrel monkeys. This chemospecific subpopulation comprises both large and small bipolar and multipolar neurones distributed according to a rostrocaudal decreasing gradient. The large neurones outnumber small neurones throughout the pallidum; they abound principally in the external pallidal segment, whereas the small neurones prevail in the internal segment. Some pallidal CR-positive neurones display dorsoventrally elongated dendrites, while others show dendrites radiating in all directions. These findings reveal that pallidal neurones form a chemically and morphologically heterogeneous population in primates.
authors.affiliation: Centre de Recherche en Neurobiologie, Hôpital de l'Enfant-Jésus, Québec City (Québec), Canada.
authors.forename: M
authors.initials: M
authors.lastname: Fortin
authors.forename: A
authors.initials: A
authors.lastname: Parent
mesh_terms: D000818:Animals; D064032:Calbindin 2; D005917:Globus Pallidus / Q000737:chemistry* / Q000166:cytology; D007150:Immunohistochemistry; D009419:Nerve Tissue Proteins / Q000032:analysis*; D009474:Neurons / Q000737:chemistry*; D064030:S100 Calcium Binding Protein G / Q000032:analysis*; D012453:Saimiri / Q000378:metabolism*
chemical_list: D064032:Calbindin 2; D009419:Nerve Tissue Proteins; D064030:S100 Calcium Binding Protein G