Character of the mechanical activity of the various sections of the complex stomach upon vagal stimulation

The experiments are carried out on chloralose-anaesthesized sheep (50-70 mg/kg). The increase in the force, frequency and duration of the stimulating impulses in a geometric progression leads to an increase in the amplitude of the contractions in all sections of the complex stomach. The amplitude and nature of the evoked contractions for one and the same parameters of stimulation are different in the different sections. The latency of the response in the reticulum is always shorter and its contractions increase faster than in the other sections. The relaxation of the muscles after elimination of the stimulation to the initial level is slowest in the rumen and in the case of high parameters of stimulation it takes more than 10 min.