The American journal of the medical sciences (1827)
[Thorofare, N.J., etc.] Charles B. Slack [etc.] · leaf 62
coughing, laughing, etc. The higher lines show temporary increase of pressure from within ; while the lower indicate an increase from without ; in other words, the Fig. 2. The effects of movemeats of the arm and of coughing and laughing on the respiratory -wave of the ahdomen. tendency to vacuum.… … The efi'ect of movements of the legs upon the respii'atory wave of the abdomen. though in varying degrees, is found to follow all the movements of the body, the more markedly the more suddenly they are done, whether of the legs, arms, head, or trunk (Fig. 3). It is, doubtless, produced by
Medicine
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