CHAPTER VI 



The hereditary qualities of the Neopallium and basal 

 ganglia contrasted The brain of Tertiary man 

 The brain of a microcephalous idiot The arrest of 

 human intelligence when sense organs are 'absent 

 Education through a single sense organ Associa- 

 tion nervous centres The modus operandi of a 

 sensation Memory and sensation Ideas and im- 

 pressions The mechanism of reading Sensory 

 cortical centres. 



WHILE the ordinary movements of invertebrates 

 and the three lower classes of vertebrates are 

 regulated by energy derived from their basal 

 instinctive nervous substance, a part of this 

 matter has undergone evolution in consequence 

 of the constant action on it of the new kinds of 

 energy to which the ascending orders of animals 

 have been exposed in their struggle for exist- 

 ence (see Appendix). In this way a part of the 

 cerebral cortex has become developed into what 

 is known as a neopallium, consisting of special- 



