title: [Effect of histamine on duration of phases of the respiration cycle].
abstract: Histamine produced either a bronchodilation or a bronchoconstriction in rats. In a 0.01-1.0 mcg/ml concentration histamine augmented the contractions amplitude in electrical stimulation of the trachea, in a 10-100 mcg/ml concentration histamine enhances the muscle tone thus decreasing the induced contractions. The histamine effects seems to be connected with its prevailing influence on different structures of the airways depending on the concentration. Its high concentrations act directly on the smooth muscle whereas its lower concentration affects receptors signaling the functional modules of the metasympathetic nervous system within the intramural ganglia of the trachea.
authors.affiliation: St. Petersburg State University, 199034, St. Petersburg, Universitetskaya Nab., 7/9, Russia.
authors.forename: E N
authors.initials: EN
authors.lastname: Kriukova
authors.forename: A V
authors.initials: AV
authors.lastname: Karpushev
authors.forename: S A
authors.initials: SA
authors.lastname: Frolova
authors.forename: A N
authors.initials: AN
authors.lastname: Fedin
mesh_terms: D000818:Animals; D004558:Electric Stimulation; D006632:Histamine / Q000494:pharmacology / Q000502:physiology*; D066298:In Vitro Techniques; D009119:Muscle Contraction; D009130:Muscle, Smooth / Q000187:drug effects / Q000294:innervation / Q000502:physiology; D009412:Nerve Fibers / Q000502:physiology; D051381:Rats; D012143:Respiratory Physiological Phenomena / Q000187:drug effects; D014132:Trachea / Q000187:drug effects / Q000294:innervation / Q000502:physiology
chemical_list: D006632:Histamine