. The alimentary tract : a radiographic study . n with our preconceived notions. Antiperistalsis is also stated to occur in the large intes-tine, in fact Case gives incontrovertible proof of it, and it islikely that it can occur in the normal healthy subject. Infact, to-day, I have actually seen it occur in a small way aftera mass movement had taken place. It is probable thatthis movement is exactly parallel to the usual forward massmovement but occurring in the opposite direction. One doesnot see any such movement on injecting an enema, but evena pint will be carried back to the caecum in mos
. The alimentary tract : a radiographic study . n with our preconceived notions. Antiperistalsis is also stated to occur in the large intes-tine, in fact Case gives incontrovertible proof of it, and it islikely that it can occur in the normal healthy subject. Infact, to-day, I have actually seen it occur in a small way aftera mass movement had taken place. It is probable thatthis movement is exactly parallel to the usual forward massmovement but occurring in the opposite direction. One doesnot see any such movement on injecting an enema, but evena pint will be carried back to the caecum in most cases. Besides the mass movement, one sees, from time totime, changes in the shape of the haustral sections of the largeintestine, especially in the distal colon. It is not at all amarked movement and has probably no connection with theprogress of food along the intestine. Presumably it is con-nected with digestion and acts by churning. Rieder described large pendulum movements whichappear to be much the same as the smaller haustral churning. Fig. 76.
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