Is the Brain a Calculating Machine? 149 



exclaimed that she heard voices late at night and that she saw the 'big 

 wagons they used to haul the animals (of a circus) in'. 



Eleven minutes later, the original point 11 was stimulated again. 

 She no longer heard the mother calling her little boy. Instead she 

 heard 'the voices of people calling from building to building'. 



Later still, when a coated electrode was inserted at 17 so as to 

 stimulate the first temporal convolution deep down in the fissure of 

 Sylvius, she said, 'I had ... a familiar memory, in an ofl&ce somewhere. 

 I could see the desks. I was there, and someone was calling to me, a 

 man leaning on a desk with a pencil in his hand'. 



Dr Penfield concludes that there is in the brain a permanent record 

 of the stream of consciousness, which is preserved in amazing detail. 

 The detail cannot be recalled to the memory by voluntary effort. All 

 that can be recalled as a rule are rather vague generalizations and 

 summaries of the previous experiences. Yet these are sufficient for 

 recognition, for example, of persons or scenes one has seen before. 



/»■' 



