title: [Formation of descending pathways to the spinal cord].
mesh_terms: D000818:Animals; D001931:Brain Mapping; D001933:Brain Stem / Q000196:embryology; D004525:Efferent Pathways / Q000196:embryology; D006735:Horseradish Peroxidase; D006801:Humans; D009474:Neurons / Q000166:cytology; D011985:Receptors, Serotonin / Q000032:analysis; D013116:Spinal Cord / Q000196:embryology*; D013194:Staining and Labeling; D013569:Synapses
chemical_list: D011985:Receptors, Serotonin; D006735:Horseradish Peroxidase