title: Noradrenaline induces rhythmic bursting in sympathetic preganglionic neurons.
abstract: In the in vitro slice preparation of upper thoracic cord of the cat, noradrenaline, at concentrations of 10-50 microM, induced rhythmic bursting in 30% of sympathetic preganglionic neurons of the intermediolateral nucleus. The bursting frequencies were between 0.2 and 1.0 Hz at membrane potentials between -45 and -65 mV. The bursting rhythm could be reset by short intracellular current pulses. In the presence of tetrodotoxin noradrenaline produced a rhythmic oscillation in membrane potential in the same frequency range as the bursting. The frequency of oscillation was voltage dependent. Neuronal input resistance decreased at the oscillation peak and the oscillation was abolished by cobalt or low calcium.
authors: Department of Physiology, Kurume University School of Medicine, Japan.
authors: M
authors: M
authors: Yoshimura
authors: C
authors: C
authors: Polosa
authors: S
authors: S
authors: Nishi
mesh_terms: D000200:Action Potentials / Q000187:drug effects; D000320:Adrenergic Fibers / Q000187:drug effects / Q000502:physiology*; D000818:Animals; D002415:Cats; D066298:In Vitro Techniques; D008564:Membrane Potentials / Q000187:drug effects; D009638:Norepinephrine / Q000494:pharmacology*; D013116:Spinal Cord / Q000166:cytology / Q000187:drug effects / Q000502:physiology*; D013779:Tetrodotoxin / Q000494:pharmacology
chemical_list: D013779:Tetrodotoxin; D009638:Norepinephrine