CEKEBRAL FUNCTION IN LEARNING 



71 



quiet, that the occipital and hemidecerebrate cases were slightly 

 less active than normals, that the animals with frontal lesions 

 were much more active than normals, and that those with 

 frontal and parietal lesions were both more active and more 

 restless than any of the others. 



TABLE 1 



Duration of periods of great activity and of complete quiescence in normal animals 

 and in animals after cerebral injury. The figures are based upon continuous 

 records over 24.0 hours for each animal. The total number of hours per day spent 

 in active running is given in the first part of the table. The total number of hours 

 per day in which there was little or no activity is given in the second part. The 

 numbers in parenthesis are those assigned to the animals in later experiments 

 (section HI) 



The apparently greater activity of the frontal cases might 

 be explained by the fact that these animals were somewhat 

 younger than the others rather than as due to the lesion but the 

 assumption is not borne out by the behavior of the fronto-parietal 

 cases which were much above the average in age. It seems 

 rather that the heightened activity is the result of the cerebral 

 injury, particularly as many other observers have reported 





