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



Fig. 8. 



Experiment 11, Callothrix, 14.2.12. E.F.E.E.E. — In this record the conditions were the same 

 as in the preceding figure, save that the stimulation of the extension-point was repeated thrice 

 after the application of a stimulus to the flexion-point. The first E stimulus evoked a good 

 extensor contraction. An F stimulus then gave a good flexor contraction and extensor 

 relaxation. A second E stimulus then apparently increased a state of flexor epilepsy ; a third 

 evoked (after the disappearance of the flexor epilepsy) a slight extensor contraction which soon 

 disappeared during the application of the stimulus and in its disappearance was accompanied 

 by a flexor contraction ; a fourth gave almost pure flexor contraction of an epileptiform type. 

 This record demonstrates reversal of the extension reaction by inter-current flexion-point 

 stimulation. 



the full reversal contraction of the flexor replaces contraction of the extensor 

 as the primary feature of the response (figs. 9, 10). 



