title: Hypothalamic descending afferents to cells of origin of the greater petrosal nerve in the rat, as revealed by a combination of retrograde HRP and anterograde autoradiographic techniques.
abstract: Projections from the hypothalamus to cells of origin of the greater petrosal nerve were studied by the HRP and autoradiographic techniques in the rat. After an injection of [3H]amino acids into the hypothalamus and an application of HRP to the greater petrosal nerve, we found that a compact group of HRP-labeled neurons was located within a dense accumulation of silver grains in the nucleus reticularis parvocellularis. The present results show that the hypothalamus projects directly to cells of origin of the greater petrosal nerve.
mesh_terms: D000818:Animals; D001833:Body Temperature Regulation; D001931:Brain Mapping; D005154:Facial Nerve / Q000033:anatomy & histology*; D005830:Geniculate Ganglion / Q000033:anatomy & histology; D007031:Hypothalamus / Q000033:anatomy & histology*; D008297:Male; D009434:Neural Pathways / Q000033:anatomy & histology; D010275:Parasympathetic Nervous System / Q000033:anatomy & histology; D051381:Rats; D011919:Rats, Inbred Strains; D012154:Reticular Formation / Q000033:anatomy & histology*; D012472:Salivation