334 



Information Storage and Neural Control 



nant rhythm of the analog primary. The second derivative square 

 wave train, referred to as the minor period, carries information 

 reflecting superimposed fast activity, desynchrony, and waveshape. 

 It is of particular importance to know how much wave shape 

 information is retained or lost in this processing, because it is 

 probably the wave shape which triggers recognition in the human 

 computer in clinical electroencephalography. We propose that 

 much of the wave shape information is retained in the three square 

 wave trains as they relate to one another in time, as we have 

 attempted to illustrate in Figure 3. The top trace is a synthetic 

 function made up of a "dominant" nine and one-half cycle per 

 second sine wave mixed with a lower amplitude "superimposed" 



PERIOD RECONSTITUTION 

 SYNTHETIC FUNCTION 



\nj^j\r'iS\j\s^v^'\rvriP^^ 



/Wu^^ 



mmmmmm 



\\m\mw 



nfunnn^n, 



m 



wmW' 



/ 



Fig. 3. Mixed Sine Function. K^Vi cycles pei- second sine wave niLxed with a lower 

 amplitude sine wave of approximately 36 cycles per second simulates a "dominant 

 alpha"||with "superimposed fast frequency components." Smoothing, mixing, 

 and smoothing of the tliree square wave trains result in tlie reconstituted signal 

 of tlie bottom trace. Similarity between reconstituted and original signal suggests 

 that wave shape information is retained by the processing. 



