Cells of origin of spinal projections from the paraventricular nucleus (PVN) of the hypothalamus in the chicken.
Hypothalamic neurons projecting to the lumbar (lumbar-neurons) and sacral (sacral-neurons) segments were retrogradely labeled by injections of fluorescent axonal tracers (FITC-WGA, TRITC-WGA) into both the lumbar and sacral segments. Labeled neurons were distributed in the principal part of the paraventricular nucleus (PVN), but not in the pars dispersa of this nucleus. Of these neurons, some small and oval-shaped neurons (about 10 microns in diameter) in a middle part of the PVN were observed to be labeled by both FITC-WGA and TRITC-WGA (lumbosacral-neurons) suggesting double projections to lumbar and sacral segments.
Naito
J
J
Laboratory of Animal Morphology and Function, School of Agricultural Sciences, Nagoya University, Japan. j45814a@nucc.cc.nagoya-u.ac.jp
Ishikawa
H
H
Ohmori
Y
Y
Watanabe
T
T
D000818:Animals; D001339:Autonomic Fibers, Preganglionic / Q000502:physiology; D017776:Autonomic Pathways / Q000166:cytology*; D001369:Axons / Q000502:physiology; D002645:Chickens / Q000502:physiology*; D016650:Fluorescein-5-isothiocyanate; D005456:Fluorescent Dyes; D006651:Histocytochemistry; D008856:Microscopy, Fluorescence; D009474:Neurons / Q000502:physiology; D010286:Paraventricular Hypothalamic Nucleus / Q000166:cytology*; D012235:Rhodamines; D013116:Spinal Cord / Q000166:cytology*; D014909:Wheat Germ Agglutinins
D005456:Fluorescent Dyes; D012235:Rhodamines; D014909:Wheat Germ Agglutinins; C009434:tetramethylrhodamine isothiocyanate; D016650:Fluorescein-5-isothiocyanate