Human physiology . movements obtained undersame conditions as Fig. 60,with sound introduced intocardia and fundus of stomach.(Ducceschi.) 188 PHYSIOLOGY CHAP. infrequent. These waves have a period of 35-55 sees.; theiramplitude usually exceeds the excursion of the writing lever. When the sound is introduced into the pyloric antrum, a verydistinct form of rhythmical movement appears, consisting ofsystoles and diastoles in regular succession, which are determinedby the total contraction or relaxation of the muscles of the antrum(Fig. 63). Each revolution takes 10-30 sees., a shorter periodt
Human physiology . movements obtained undersame conditions as Fig. 60,with sound introduced intocardia and fundus of stomach.(Ducceschi.) 188 PHYSIOLOGY CHAP. infrequent. These waves have a period of 35-55 sees.; theiramplitude usually exceeds the excursion of the writing lever. When the sound is introduced into the pyloric antrum, a verydistinct form of rhythmical movement appears, consisting ofsystoles and diastoles in regular succession, which are determinedby the total contraction or relaxation of the muscles of the antrum(Fig. 63). Each revolution takes 10-30 sees., a shorter periodthan each peristaltic wave. No other form of contraction due tothe tonic state of the walls is ever seen in the antrum, probablybecause the circular fibres predominate so largely. The study of the conditions which produce these movementsof the stomach and their co-ordination with the several phasesof gastric digestion was very incomplete prior to B
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectphysiology, bookyear1
