. A practical treatise on medical diagnosis for students and physicians . omiting-centre ; but it is also quite possiblydue to the propagation of impulses to the vomiting-centre from the brainwlien the latter is irritated by toxins in the blood. If the phenomena ofhysteria are due to an abeyance of the processes of inhibition, vomiting 118 SIGNIFICANCE OF VOMITING. 119 in that disease can be said to arise from the non-control, by hio-hercentres, of the vomiting-centre.^ The significance of vomiting in a given case can sometimes be deter-mined very readily ; at others it may remain in doubt eve
. A practical treatise on medical diagnosis for students and physicians . omiting-centre ; but it is also quite possiblydue to the propagation of impulses to the vomiting-centre from the brainwlien the latter is irritated by toxins in the blood. If the phenomena ofhysteria are due to an abeyance of the processes of inhibition, vomiting 118 SIGNIFICANCE OF VOMITING. 119 in that disease can be said to arise from the non-control, by hio-hercentres, of the vomiting-centre.^ The significance of vomiting in a given case can sometimes be deter-mined very readily ; at others it may remain in doubt even after verycareful examination and questioning of the patient. In seeking for anexplanation of vomiting it is of importance to find out the previous stateof health of the patient—^whether the vomiting occurred after the patienthad been ill for a longer or shorter time, or suddenly when he was inapparent health; or whether it formed one of the initial symptoms of anacute disease. Fig. 10. LIVERGALL-BLADD STOAAACH KIDNEYAND URETER INTESTINE UTERUS-BLADDER VESICALNERVE. NERVOUS CENTREOF VOMITING INTHE MEDULLAOBLONGATA -•SPINAL CORD PULMONARYBRANCHES SPLANCHNICS GALL-DUCT RENAL NERVES ..} MESENTERICNERVES . /uterine I NERVES The nervous mechanism, of vomiting. (After Beunton.) Inquiry should be made as to the supposed cause of the vomiting;whether it was excited by the taking of food, drink, or medicine, or bysome disgusting sight or odor. The time when the vomiting occurred should be ascertained, as well asits frequency, and whether it was preceded by nausea, pain (noting itslocality), injur}^, cough, jaundice, or constipation. The position of the patient at the time of vomiting sometimes furnishesa valuable clue to its cause. The effect of the vomiting is sometimes of aid in diagnosis. In ulcerand in migraine, for example, it affords marked relief. Finally, the appearance and quantity of the matter vomited are veryimportant subjects for investigation. (See Objective Signs.)
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