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MESSRS. F. GOTCH AND V. HORSLEY 



was the seat of galvanometric observation. In this way it was obvious that, when the 

 excitation was so limited to one hemisphere as to produce only unilateral muscular 

 movements, no impulses descended the fibres on the same side of the spinal cord 



Fig. 9. 



Note the liemisection of the cord on the right side at the level of the 9th dorsal vertebra. 



and all impulses passed down the side opposite to that of the hemisphere 

 excited. 



That this conclusion was correct was confirmed by observing that even when on 

 repeating the experiment a bilateral fit was obtained from stimulating either cortex, 



