title: Spinal neurons which project to the periaqueductal gray and the medullary reticular formation via axon collaterals: a double-label fluorescence study in the rat.
abstract: Fluorescent retrograde double-labeling methods were used in which Fast blue and Nuclear yellow or Diamidino yellow dihydrochloride were injected into the midbrain periaqueductal gray (PAG) and medullary reticular formation (MRF). Double-labeled neurons were most frequently observed in the lateral part of lamina V, in laminae VII, VIII and X and in the lateral cervical and lateral spinal nuclei. The data demonstrate that some spinal neurons project to both the PAG and the MRF via axon collaterals.
mesh_terms: D000578:Amidines; D000818:Animals; D001369:Axons / Q000032:analysis*; D001562:Benzimidazoles; D001931:Brain Mapping; D005727:Ganglia, Spinal / Q000166:cytology*; D008856:Microscopy, Fluorescence; D009434:Neural Pathways; D010487:Periaqueductal Gray / Q000033:anatomy & histology*; D051381:Rats; D012154:Reticular Formation / Q000033:anatomy & histology*; D000096926:Benzenesulfonamides
chemical_list: D000578:Amidines; D001562:Benzimidazoles; C031455:diamidino compound 253-50; C036574:nuclear yellow; D000096926:Benzenesulfonamides; C037945:diamidino yellow