. Fever, thermotaxis, and calorimetry of malarial fever. rature approaching thedeath-point does it rise to normal or a little above it. Ifthe animal is breathing rapidly, and a probe be thrust intothe tissues of the brain between the corpora striata andoptic thalami, then the respiration is reduced greatly, andremains so, no matter what the internal temperature of theanimal. If, with a pair of electrodes insulated to near theirpoint with sealing-wax and attached by a wire to an uprighton the rabbit-holder to steady them, an induction currentis sent through them for about three minutes, then th
. Fever, thermotaxis, and calorimetry of malarial fever. rature approaching thedeath-point does it rise to normal or a little above it. Ifthe animal is breathing rapidly, and a probe be thrust intothe tissues of the brain between the corpora striata andoptic thalami, then the respiration is reduced greatly, andremains so, no matter what the internal temperature of theanimal. If, with a pair of electrodes insulated to near theirpoint with sealing-wax and attached by a wire to an uprighton the rabbit-holder to steady them, an induction currentis sent through them for about three minutes, then the res-pirations in the animal with his cortex removed are doubledor trebled in number. In Fig. 3 the line marked I is normal, and during the2d, 3d, and 4th curves the current is acting on the centreto produce polypncea, which is shown in the curve marked5. The current was so weak as scarcely to be perceptibleto the tongue, and the electrodes were pushed to a pointlying just over the parts between the corpora striata and THE THERMO-POL YPNCEIC CENTRE. 5. Fig. 4. THE THERMO-POLYPNCEIC CENTRE. J optic thalami. In some experiments a single inductionshock per second was sent through the centre above men-tioned, and arrest of the chest in expiration obtained. Thisis seen in Fig. 4, which is to be read from right to left. To establish a centre, three things are necessary: 1st,that its abolition causes the phenomena to disappear ; 2d,that irritation—mechanical, chemical, or electrical—causesthe phenomena to be present; 3d, that the part of the ner-vous system exhibiting these peculiarities is circumscribedin extent. If now I apply these tests to the polypnoeiccentre, it is found that the function disappears when thispoint is destroyed, and that it appears when the same partis electrically irritated, and, third, that this centre or pointis circumscribed in extent. It seems to me that thepolypnoeic centre is fully established. This discovery alsoshows that in lower animals external h
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Keywords: ., booksubjectbodytemperature, booksubjectfever, booksubjectmalaria
