On the action of the muscular coat of the bronchial tubes in respiration, and on the exciting cause of inspiration and of expiration / by C. Radclyffe Hall.
- Hall, Charles Radclyffe.
- Date:
- [1850?]
Licence: Public Domain Mark
Credit: On the action of the muscular coat of the bronchial tubes in respiration, and on the exciting cause of inspiration and of expiration / by C. Radclyffe Hall. Source: Wellcome Collection.
Provider: This material has been provided by The University of Glasgow Library. The original may be consulted at The University of Glasgow Library.
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![lengthened. In a few minutes they were, without galvanism, 42; with galvanism, 72. The most marked effect of the galvanism upon the expiration, now that this was slower, consisted in the more prolonged, continuous, and forcible expulsion of the air. The thorax was now opened on the right side, so as to expose the right lung and the right side of the heart. The expirations without galvanism were, 48 j with galvanism to the left vagus, 54. No movement whatever could be excited in the exposed right lung, which of course was collapsed, either by galvanism to the right vagus or to the lung itself. The heart ceased to manifest any increase of action from galvanising the nerves in the neck, but contracted with increased vigour and frequency on galvanising the ventricles. The opposite side of the thorax was now opened. Of course respiration instantly ceased, and could not be re-excited by galvanising one vagus, both vagi together, lungs by themselves, or lungs and vagi. No effect now followed the application of galvanism to the bronchial tubes, either whilst the lungs were warm and in situ, or after their removal from the chest. Experiment 2.—The trachea and left vagus were laid bare in a large fowl. Expirations were now 48. On applying galvanism, as in the preceding experiment, to the trachea, vigorous convulsive movements of the whole body, and rapid quivering elevations and depressions of the wind-pipe ensued; so rapid that it could not be ascertained satisfactorily whether the individual rings of the trachea were approximated to each other or not. The trachea was then cut through, a tube inserted, and galvanism applied to the lower portion. This affected equally the upper and the lower segment of the wind-pipe, proving that the electricity was conducted by the warm, moist muscles on which both portions of wind-pipe rested. The left vagus was now isolated over a slip of wood. Expirations without galvanism, 48 ; with galvanism, to the nerve, 72. With galvanism to the trachea only, expirations 54, and general struggling. With galvanism applied again to the left vagus, expirations 60; without galvanism, 48. The vagus was not cut through in this experiment. After death, galvanism was immediately a])plicd to the heart, stomach, trachea, bronchi, and substance of lung, but produced no effect.](https://iiif.wellcomecollection.org/image/b21470960_0009.jp2/full/800%2C/0/default.jpg)
