[Incidences of resistance capacity (RC) and of electrode-interval enlargement on the gastro-intestinal electrical activity of the awake dog (author's transl)].
By the use of differents resistance capacity (RC) values (0,3, 0,7, 1, 3, 6 and 7 s.) during bipolar recordings of digestive electromyogramme in chronically implanted dogs, it has been shown that the RC incidences were:--an increase of the slow wave potential amplitude, the optimale value of the RC was 3 sec;--the detection with long RC (1, 3, 6 and 7 S.) of a slow post-potential at the antral level. But there is no effect of the RC on the slow wave duration and on the spikes potentials caracteristics (amplitude-duration number). When the interval between the two active electrodes is increased (0,5 to 63 cm) the slow wave amplitude is enlarged; the best results on the slow wave amplitude are obtained with an electrode-interval of 7 to 8 cm. In cases of an important interval between two active electrodes (8, 16, 32, 63, 190 cm), the slow wave frequency at an intestinal level is dependent of the upward electrode. The spikes potentials are affected by electrode interval enlargement, and are dependent of the contractil events which can appear under each separated electrode.