THE MOVEMENTS AND INNERVATION OF THE LARGE INTESTINE OF THE BULLFROG (Rana catesbiana)
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(1) In the large intestine its anterior half (ampulla) was full of its contents, while its posterior part (isthmus) was constricted to be wholly empty.<BR>(2) It was found that on the bullfrog large intestine pulsations recurrently occurr-ed in the oral circumference of the orifice where the bladder was opened into the cloaca, traveling upwards the gut wall as shallow contraction waves (antiperistaltic waves), respectively.<BR>(3) The 10th or 11th spinal nerve stimulation produced a remarkable excitation of the movements: Firstly an excessive shortening of the gut occurred to produce a shift of contents through the isthmus to the cloaca and was then followed by an excessive rise of tone superimposed with powerful antiperistaltic waves, occasionally a small amounts of contents being forced out of the anus. Such a movement might be considered to be a first stage of the defecation movement.<BR>(4) Any sigh of the intrinsic mucosal reflex was not observed with the stimulation either of a spot or of the whole surface (by raising the intraluminal pressure) of the mucosa of the large intestine. These facts suggest that in the bullfrog the intramural ganglion cells have no function to regulate the strength as well as the direction of propagation of contraction waves.
- 日本平滑筋学会の論文
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関連論文
- THE MOVEMENTS OF THE LARGE INTESTINE OF THE FOWL
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- OBSERVATIONS ON THE GASTROINTESTINAL MOVEMENTS OF THE TORTOISE (GEOCLEMYS REEVESII) BY MEANS OF THE ABDOMINAL-WINDOW-TECHNIQUE
- A PECULIAR PHENOMENON, THE PROLAPSUS OF THE ESOPHAGUS-STOMACH, OBSERVED IN THE VOMITING OF THE FROG
- THE MOVEMENTS AND INNERVATION OF THE LARGE INTESTINE OF THE BULLFROG (Rana catesbiana)
- SOME OBSERVATIONS ON THE DEFECATION OF THE BULL-FROG (Rana catesbeiana)
- THE ROLE OF THE INTRAMURAL GANGLION CELLS TAKEN IN THE ILEO-COLIC MOTILITIES OF THE CATFISH (Parasilurus asotus)