Cerebrology in Phrenology. 617 
mentality in some or several directions, if thorough tests be made. 
What has been grouped under change of character should be sifted 
to ascertain what constitutes the change. If we grant, as we must, 
that all these function areas, ascertained to be such, are related, con- 
nected, by multitudes of strands and cells in the most complex man- 
ner over and across the blank spaces, then lesion of those spaces 
must interfere with the connections, the mental associations possible 
before cannot now be made. Occasionally “word deafness” or 
“word blindness” occurs, peculiar inability to connect words heard 
or read with any memory of their import, and, as could be expected, 
this impairment occurs when the lower parietal or “angular gyrus” 
region is the seat of the disease. While this consequence of injury 
to this part has been long known, I believe this to be the first 
announcement of the reason for it, and I will predict that the addi- 
tional offices of this “blank area” will be established as noted 
below. “ Arcuate ” connecting fibrils enmesh the brain surface, 
uniting faculties intricately, in a manner obviously dependent upon 
the education and other circumstances of the individual. These 
fibrils and their generating cells may pile up in certain parts and be 
defective in others ; the musician will have more connections 
between the auditory and motor centres, and the painter between 
the optic and motor, than others. One whose impulses or springs 
of action are well subordinated to what he has learned through 
optic, auditory or other senses, will have greater strands of connec- 
tions between the sensory and motor brain parts to regulate his 
deeds than the impulsive or heedless person. 
These blank spaces become what might be styled inhibitory 
regions, in that they restrain acts; they can also more properly be 
called impulse areas, because they regulate and prompt actions. As. 
they correlate the sense and motor centres, they are also memory 
areas, as is evident when injury causes words to convey no meaning 
to the mind. Now, if what we see, feel and hear govern our 
actions, he who profits best by what he has been taught, or upon 
whom such teaching makes the best impression, will, à priori, have — 
the most abundant supply of arcuate fibrils in this parietal region ; 
such restraint or guidance unavoidably causes acts to be less impul- 
‘ive, more subordinated to the interests of the individual. If those 
needs are considered to be best conserved by subservience to others 
