Fig. 4. Length/tension diagrams for the m. hyoglossus in Chamaeleo calyptratus. (A) The results of an experiment similar to that shown in Fig. 3, but with the muscle tetanically (40 Hz) stimulated. (B) The results of a preliminary experiment in which the tongue was attached to a force transducer and stimulated through two bipolar electrodes inserted into the anterior part of the muscle. Here, forces were recorded several times for four discrete tongue extensions.