A text book of physiology . teries themselves, since a rise ofpressure follows upon dyspnoea when the spinal cord has beenpreviously divided below the medulla, yet the fact that it is muchless under those circumstances shews that the medullary centre playsthe chief part. Upon the cessation of the artificial respiration, the 1 Luchsinger, Pflugers Archiv, xvi. (1878) p. 510. Chap, il] RESPIRATION. 3-17 respiratory undulations cease also, so that the blood-pressure curverises at first steadily in almost a straight line; yet after a while newundulations, the so-called Traubes curves, make their a
A text book of physiology . teries themselves, since a rise ofpressure follows upon dyspnoea when the spinal cord has beenpreviously divided below the medulla, yet the fact that it is muchless under those circumstances shews that the medullary centre playsthe chief part. Upon the cessation of the artificial respiration, the 1 Luchsinger, Pflugers Archiv, xvi. (1878) p. 510. Chap, il] RESPIRATION. 3-17 respiratory undulations cease also, so that the blood-pressure curverises at first steadily in almost a straight line; yet after a while newundulations, the so-called Traubes curves, make their appearance(Fig. 51. 2, 3), very similar to the previous ones, except that theircurves are larger and of a more sweeping character. These newundulations, since they appear in the absence of all thoracic or pul-monary movements, passive or active, and are witnessed even when \ !iI ! I l/l M/\/ ! i ! i / v !il SI ! i r l\ ! \ i i I ! i 1 ! i !! 1/iW Mill i \! \i i ft ? »! n ii\ /i i/ / i I1 i. il » If lii! ; Fig. 51. Teaubes Curves. To be read from left to right. The curves 1, 2, 3, 4, 5 were taken at intervals, and all form part of one experi-ment. Each curve is placed in its proper position relative to the base hue, which, tosave space, is omitted. During 1, artificial respiration was kept up, the undulationsvisible are therefore not due to the mechanical action of the chest. When theartificial respiration was suspended these undulations for a while disappeared, andthe blood-pressure rose steadily while the heart-beats became slower. Soon, as shewnin curve 2, the undulations re-appeared. A little later, the blood-pressure was stillrising, the heart-beats still slower, but the undulations still obvious (curve 3). Stilllater (curve 4), the pressure was still higher, but the heart-beats were quicker, and theundulations flatter. The pressure then began to fall rapidly (curve 5), and con-tinued to fall until some time after artificial respiration was resumed. both vagi are cut
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Keywords: ., bookcentury1800, bookdecade1870, bookpublisherlondo, bookyear1879
