title: [The bi-directional modulation of endogenous pain modulating system].
authors.forename: Ying
authors.initials: Y
authors.lastname: Liu
authors.forename: Yi-Kuan
authors.initials: YK
authors.lastname: Xie
mesh_terms: D000818:Animals; D001933:Brain Stem / Q000033:anatomy & histology / Q000502:physiology*; D009434:Neural Pathways / Q000502:physiology*; D010146:Pain / Q000503:physiopathology*; D051381:Rats