260 Mr. Graham Brown and Prof. C. S. Sherrington. [Mar. 16,. 



Fig. 6. 



Experiment 14, Macacus sinicus, 21.2.12. — Kecord of a series of five successive stimuli 

 applied to a flexiou-point on the cortex. The first evokes a flexor contraction, which is 

 followed by slight epilepsy. The second stimulus is applied during this, and instead of 

 giving a flexor contraction, produces a relaxation. After this the epilepsy becomes more 

 evident, and a third stimulus again reduces it. The epilepsy is again established at the 

 cessation of the third stimulus, and is again reduced by the application of the fourth 

 stimulus. The flexor epilepsy is not again established, and a fifth stimulus gives no 

 apparent reaction. This record demonstrates reversal during epilepsy. 



IV. Change in the Eesponse of a Cortical Point Subsequent to 

 Stimulation of a Cortical Point Antagonistic to it. 

 (a) Cliange in the Response of an Extension- Point subsequent to Stimulation oj 

 a Flexion-Point. 



The relative constancy of the characters of the muscular response to an 

 extension-point having been ascertained for a given stimulus by registering 



