On the changes in volume of the submaxillary gland during activity / by J.L. Bunch.

  • Bunch, John Le Mare.
Date:
1900
Catalogue details

Licence: In copyright

Credit: On the changes in volume of the submaxillary gland during activity / by J.L. Bunch. Source: Wellcome Collection.

Provider: This material has been provided by The Royal College of Surgeons of England. The original may be consulted at The Royal College of Surgeons of England.

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    volume of sympathetic stimulation with the duct clamped under conditions where the sympathetic produces a free flow of watery Fig. 22. Fog. Simultaneous stimulation of chorda and sympathetic nerves after administration of a small dose of atropine. The sympathetic stimulation was slightly stronger than that of the chorda, and the after-dilatation due to stimulation of the fibres of the latter was not seen. secretion. In one experiment, a dog weighing 8‘2 kilos, was kept under the influence of a.c.e. mixture, and the right submaxillary gland (volume 6'9 c.c.) was placed in the plethysmograph after being freed from its capsule, but without any veins tied. The chorda and sympathetic nerves were both placed upon Ludwig’s electrodes, con- nected with a reverser. The right chorda was stimulated intermittently with the coil at 12 cm. for 12 minutes, each stimulation causing diminution of the volume of the gland and a free flow of secretion from the duct. When the secretion caused by the last stimulation had ceased, the duct was clamped, and the sympathetic stimulated. The first effect was to produce a distinct dilatation of the gland, which was followed by a shrinking due to the vaso-constrictor action of the nerve, the general blood-pressure, however, remaining constant (Fig. 23). A second stimulation of the sympathetic with the duct again clamped after the gland-volume had returned to normal showed only shrinking of the gland. The chorda was then stimulated intermittently