Responsiveness 67 



growth. 1 As soon as cells divide and differ- 

 entiate, the manifestations of consciousness 

 should appear in connection with this growth. 

 Any aggregate of cells that becomes structure 

 should be the means of making more definite 

 the two elementary functions, movement and 

 consciousness. This would be true if the out- 

 ward current through any structure should 

 create movement and the return current should 

 arouse memory, the simplest element in con- 

 sciousness. If a structure permitted an out- 

 ward flow that appears objectively as motion, 

 no additional mechanism would be needed for 

 a return flow which should affect the germ cell 

 and so excite thought. When the outgoing 

 and incoming currents traverse the same struc- 

 ture, the effects of the current from the germ 

 cell to the somatic cells is movement, and 

 those of the current from the somatic to 

 the germ cell is memory. When the outgoing 

 and incoming currents utilize different struc- 

 ture, the one is motor and the other is sensory. 

 Sensation comes, therefore, at a later stage 

 of development than memory, and demands a 



1 1 use "growth " in the sense of the multiplication of cells. 



