596 CEREBRAL MENTAL SUBSTRATA. 



fessor Bain.* That mental representative of a Word 

 which is least distinct and most difficult to revive (what- 

 ever may be the view entertained as to its precise nature 

 and origin), is here declared to be of most importance in 

 regard to Thought and Speech processes — as of so much 

 importance that it is spoken of by Prof. Bain as con- 

 stituting the " material of our recollection " in the use 

 and production of Words, whilst no mention is in this 

 place made of other (auditory and visual) modes of revival. 

 Again, relying much upon the above and allied doc- 

 trines, Dr. Hughlings Jacksonf has repeatedly and in the 

 most forcible manner, urged his own view that '^men- 

 tal operations in the last analysis must he merely the 

 suhjeclive side of sensory and motor substrata.'' For 

 those who hold, as Hughlings Jackson does, the view 

 of Bain, Wundt, and others, to the effect that our 

 Consciousness of * muscular activity' is in great part 

 initial, centric and realizable in the Motor Centres — this 

 mode of expression is legitimate enough : it is, in fact, 

 its logical outcome. But for those who wholly disbelieve 

 this general doctrine, as Dr. Ferrier does, and who regard 

 all sensations or impressions connected with Movement as 

 derivable from peripheral ' ingoing ' impressions emanating 

 from the moving parts themselves, and not going back 

 to the Cerebrum along motor nerves, such an opinion and 

 such modes of expression would be altogether inadmissible. 



* " The Senses and the Intellect," 3rd Ed., p. 336. It is true 

 that in other parts of the same work {e.g., on p. 436) Prof. Bain, 

 in a contradictory manner, refers to sensory elements of the auditory 

 type as the most important components of our memory of spoken 

 lan<,ni!ige; but this in no way diminishes his resiwnsibility for tho 

 emphasised statement above quoted. (See " Fortnightly Review," 

 Ap. 1869, p. 493.) 



f " Clin, and Physiolog. Hesearch on the Nervous System,'* 

 (Beprint), 1876, pp. xx-xxxvii. 



