274 Prof. C. S. Sherrington. [Apr. 17, 
Fic. 2a, 
electromagnet 
of primary 
circuit 
Myograph 
Time in 
|’ 

Fics. 2A and 28.—The “ flexion reflex” observed as reflex contraction (excitation) of the 
flexor muscle of the knee (fig. 2A) and as reflex relaxation (inhibition) of the extensor 
muscle of the knee (fig. 2B). Conditions the same as in fig. 1, except that secondary 
coil of inductorium is nearer to primary, and therefore stimulation more intense. 
The latency is therefore shorter than in the pair of observations yielding fig. 1. In 
fig. 2a the first three stimuli fall within the latent period ; in fig. 28 the first two 
