ANIMAL HEAT. 
the cortex during the performance of the puncture did not cause any 
rise of temperature. The high internal temperature after puncture of 
the corpus striatum was accompanied by an increase in the temperature 
of the skin, and by an increase in the respiratory exchange, and in the 
discharge of nitrogen in the urine. The mean result of the determina- 
tions of the respiratory exchange was as follows : — 
Rectal Temperature. 
Oxygen. 
Carbon Dioxide. 
in c.c. at 0° C, 760 m. 
n. per Kilo, and Hour. 
Before puncture 
After puncture 
38° -5 
39°-8 
664°-0 
749*7 
626° 7 
715°-8 
Aronsohn and Sachs conclude that the rise in temperature after the 
puncture is due to increased production of heat, and increased metabolism, 
arising from the stimulation of the corpus striatum. 
These experiments have been repeated and extended by Hale White, 1 
who found no rise in the temperature of rabbits after lesions of the 
white matter of the cerebrum, but an almost constant effect after injury 
of the corpus striatum and optic thalamus. In the case of lesions of 
the corpus striatum, the rectal temperature rose to 41° - 6 in two cases, 
to 41° - 1 in eleven cases, and to 40° in eighteen ; while in three cases 
there was a slight rise, and in two a fall in temperature. The average 
rise was 1 0, 7, and was attained within four to sixteen and a half hours 
after the operations, and persisted for about sixty-two hours. After 
lesions of the optic thalamus, the average rise of temperature was 1°'4. 
Hale White concludes that the corpus striatum and the optic thalamus 
can modify the temperature of the body, and that they do not work 
directly through the vasomotor system. No increase in the discharge of 
carbon dioxide was observed in rabbits after damage to the corpus 
striatum. 2 
Several cases of a rise in temperature in man after a haemorrhage 
into the corpus striatum have been recorded. 3 
Kecently Tangl i has observed the effect of puncture through the 
anterior part of the optic thalamus in horses. In one case the tempera- 
ture rose to 40°-8 within twenty-four hours, in another to 40°-4 within 
sixteen hours of the operation, and in two other cases there was no 
effect. The temperature remained only for a short time at the above 
height, and then fell. 
Freclericq 5 found that removal of the cerebral hemispheres in pigeons 
caused practically no difference in the daily curve of their rectal 
temperature. This observation has been confirmed by Corin and Van 
Beneden, 6 who have, in addition, shown that the pigeons without their 
cerebral hemispheres produce the same amount of carbon dioxide and heat 
1 Journ. Physiol., Cambridge and London, 1890, vol. xi. p. 1. 
2 Hale White, Croonian Lectures, Lancet, London, 1894, July 10, and Brit. Med. Journ., 
London, 1897, vol. ii. p. 71. 
3 Bourneville, Ferrier, J. H. Bryant, Hale White ; references given by Hale White, Brit. 
Med. Journ., London, 1894, 17th Nov. 
4 Arch. f. d. yes. Physiol., Bonn, 1895, Bd. lxi. S. 559. 
6 Arch, de biol, Gand, 1882, tome iii. p. 747. 
6 Ibid., 1889, tome vii. p. 265. 
