Search results for "Nerve fibres"
showing 2 items of 2 documents
Die Wirkung von Reserpin auf die Konzentration von Adrenalin und Noradrenalin im Katzenherz
1959
1. Cats were given single injections of 1.8 mg/kg reserpine intraperitoneally. After a time interval of 18 hours the animals were killed. The concentration of adrenaline and noradrenaline in the right and left atria and ventricles was estimated by a method reported previously. 2. Reserpine caused a similar loss of catechol amines from all parts of the heart. The concentration of noradrenaline was reduced by 93–97%, the concentration of adrenaline by 59–79%. 3. These observations suggest that the adrenaline of the heart behaves differently from that of sympathetic ganglia or postganglionic nerve fibres after an injection of reserpine. In ganglia and nerve fibres the adrenaline concentration …
EMERGENCE OF TRAVELLING WAVES IN SMOOTH NERVE FIBRES
2008
International audience; An approximate analytical solution characterizing initial condi- tions leading to action potential ¯ring in smooth nerve ¯bres is determined, using the bistable equation. In the ¯rst place, we present a non-trivial sta- tionary solution wave. Then, we extract the main features of this solution to obtain a frontier condition between the initiation of the travelling waves and a decay to the resting state. This frontier corresponds to a separatrix in the projected dynamics diagram depending on the width and the amplitude of the stationary wave.