Experiments on Impulse Generation and Impulse Conduction in the Frog Heart (Experimente zur Erregungsbildung und Erregungsleitung am Froschherzen)

Description: This video film provides a brief overview of the anatomy and progression of an action potential.   The action potential is interrupted by placing the first and second Stannius ligatures, after which the secondary and tertiary pacemaker centres take over.   Electrical stimulation of the frog's ventricle and the gluteal musculature demonstrates that tetanic contractions cannot be induced in heart muscle, as opposed to skeletal muscle.   Electrical stimulation of the parasympathetic and sympathetic fibres of the vagus nerve demonstrates characteristic changes in the action potential and nervous conduction in the heart.

Comments & References: Running time: 14 minutes. Languages: German and English.   Produced in 1991-92, published in 1993. Available as a DVD or Video Film. Published by Institut für den Wissenschaftlichen Film (IWF) in Göttingen, Germany. A copy may be requested from Filmarchives Online at http://www.filmarchives-online.eu.

Version: 1993

Price: Please contact the Filmarchives-online.eu