TABLE 3 ' 



Data for group B, trained before operation, with postoperative retention tests 

 seven days after operation. Serial numbers, per cent of neopaUiu/m destroyed, 

 number of trials required for learning, number of errors during learning, errors 

 in preliminary retention tests, errors made in postoperative tests, estimated 

 destruction of hippocampus (H), of superior colliculi (S), and of inferior 

 colliculi (I) are given in successive columns. Cases included from earlier 

 studies are marlced with an asterisk 



17 



