Brain and the Conditions of Recovery after Compression. 11 



Ex. a 



Ex.b. 



somewhat prejudicial to a good reaction ; they produce a somewhat 

 larger excursion. [A weight of 200 grams will gradually lacerate a 

 dead brain.] 



C. Consideration of the Relation of the foregoing results to the Blood 



Pressure. 



We may fii'st take in this connexion the experiments in the series 

 just described, and compare the reaction to the height of the blood 

 pressure, to test the influence of the latter as a possible factor in the 

 establishment of the recoil of the brain. 



(a.) Comparison of Experiments on tlte uninjured Brain in different 

 Dogs with individually different, but normal, Blood Pressures. Below is 

 a table of experiments performed on the normal brain in the course 

 of which the blood pressure was measured. 



It will be seen that there is absolutely no relation to be found 

 between the individual " elasticities " and blood pressures. 



