254 Information Storage and Neural Control 



GENERALIZATION TO 10 cp» FLICKER AFTER TRAINING TO 4 cos SOIIV 



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 RESPONSE TO 10 cps FLICKER AFTER DIFFERENTIATION lOpv 



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Fig. 6. 



R. NUC. RET. — Right nucleus reticularis 

 L. MSS CX — Left medial suprasylvian cortex 

 R. VIS CX— Right visual cortex 

 L. VIS CX — Left visual cortex 

 L. LAT. GEN. — Left lateral geniculate 

 L. DORS. HIPP.— Left dorsal hippocampus 

 L. RF — Left mesencephalic reticular formation 

 L. CM — Left centre median 

 (Histological verification not yet available.) {Top) Electrical responses to ten 

 per second flicker during generalization, after avoidance training using a four 

 per second flicker tracer conditioned stimulus. (Bottom) Electrical responses to 

 ten per second flicker following differentiation of avoidance response. (4 per 

 second — S^, 10 per second — S'^). (From Weiss, Marc: Unpublished master's 

 thesis, University of Rochester, 1962.) 



Figure 7 illustrates an average response waveform obtained from 

 the lateral geniculate body of this animal during generalized per- 

 formance of the conditioned response to the ten per second flicker. 

 This computation was obtained using a Mnemotron average re- 

 sponse computer and is based on 100 periods of ten per second 



