Information Storage and Neural Control 



(•^)^-(^)>[X. 



(X-)-X(X)>LaJ 



(X)X(;^)> 



Figure 4 



B 



Figure 5 



sions for a net of three neurons whose output neuron goes through 

 X and requires interaction, as does the left-hand neuron. Obviously 

 no more is possible, for the output would always or never fire. 



One more trick served by interaction is the use of separate 

 shifts in d that are produced by feedback to secure flexibility of 

 function. Consider the net of Figure 5 in which the feathered 

 arrows indicate feedback affecting 0's. This net can be made to 



