title: The origin of substance P and acetylcholine projections to the ventral tegmental area and interpeduncular nucleus in the rat.
mesh_terms: D000109:Acetylcholine / Q000378:metabolism*; D000818:Animals; D001921:Brain / Q000378:metabolism; D006651:Histocytochemistry; D008636:Mesencephalon / Q000033:anatomy & histology*; D009434:Neural Pathways / Q000033:anatomy & histology*; D051381:Rats; D013373:Substance P / Q000378:metabolism*
chemical_list: D013373:Substance P; D000109:Acetylcholine