Letter of application and précis of contributions to physiology of / Augustus D. Waller.

  • Waller, Augustus Désiré, 1856-1922.
Date:
1895
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Licence: Public Domain Mark

Credit: Letter of application and précis of contributions to physiology of / Augustus D. Waller. 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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    PRECIS OF PHYSIOLOGY In the following “ precis ” I have not attempted to give any minutely detailed list of contents, but only memoranda of such points as appear to me on reconsideration to be definite and significant. When possible, quotation is made from the short paragraphs setting them forth in my “ Intro- duction to Human Physiology,” or from independent reviews, on the presumption that in such instances the previous exposition to criticism has been to some extent a test of viability. I. Die Spannung in den Vorhofen des Herzens wahrend der Beizung des IIalsmarkes. Du Bois-Reymond’s Archiv, 1878, p. 525. Work done at Leipzig, forming part of the investigation of vascular and cardiac nerves, carried out by various observers under the guidance of Professor Ludwig. Chief results and conclusions.—Tetanisation of the spinal cord causes a distension and arrest of the left auricle ; this is a mechanical effect of increased pressure, by vaso-constriction, not a nerve-inhibition, for it can be produced by mechanical con- striction of the aorta. It is not due to regurgitation from the left ventricle, for ventri- cular pressure may be 10 cm. Hg, while auricular pressure is in maximo 2 to 3 cm. No such effect is produced in the right auricle, i.e. there is no vaso-constriction in the lung comparable with the systemic vaso-constriction produced by tetanisation of the cord. Beasons given why medullary excitation need not be expected to produce pul- monary vaso-constriction. Cf. Opencliowsky, “ Ueber die Druckverhiiltnisse im kleinen Ivreislaufe,” xxvii. p. 233. 1882. II. Note of Observations on the Rate of Propagation of the Arterial Pulse-wave. Journal of Physiology, Yol. iii. p. 37. 1880. Measurements by the graphic method made at Professor Burdon-Sanderson’s sug- gestion. The average results are shortly summarised in the following figure (not in original paper).