title: The accessory optic system in the frog, Rana Pipiens: an electron microscopic study of the retinal afferents utilizing the anterograde tracer biocytin.
abstract: The retinal afferents to the basal optic nucleus in the frog, Rana Pipiens, were labeled anterogradely with biocytin and subsequently studied at the electron microscopic level. Labeled synaptic terminals in the nucleus varied in size from 0.5 microns to 2.0 microns and made symmetric synaptic contacts with large and small dendrites, although very rare axospinous and axosomatic contacts were also demonstrated.
authors.affiliation: Department of Neurological Surgery, University of Virginia Health Sciences Center, Charlottesville 22908, USA.
authors.forename: G A
authors.initials: GA
authors.lastname: Helm
authors.forename: C G
authors.initials: CG
authors.lastname: diPierro
authors.forename: P E
authors.initials: PE
authors.lastname: Palmer
authors.forename: N E
authors.initials: NE
authors.lastname: Simmons
authors.forename: S O
authors.initials: SO
authors.lastname: Ebbesson
mesh_terms: D000818:Animals; D001369:Axons / Q000502:physiology / Q000648:ultrastructure; D006651:Histocytochemistry; D008239:Lysine / Q000031:analogs & derivatives; D008854:Microscopy, Electron; D009475:Neurons, Afferent / Q000502:physiology* / Q000648:ultrastructure; D017729:Presynaptic Terminals / Q000502:physiology / Q000648:ultrastructure; D011894:Rana pipiens; D017981:Receptors, Neurotransmitter / Q000502:physiology / Q000648:ultrastructure; D012160:Retina / Q000166:cytology / Q000502:physiology* / Q000648:ultrastructure
chemical_list: D017981:Receptors, Neurotransmitter; C013411:biocytin; D008239:Lysine