248 Prof. C. S. Sherrington. Break-shock 



electrodes are placed on the tongue, and at closer coil distances still becomes 

 unpleasant (secondary coil at 16 cm. or less), the resulting increments in reflex 

 contraction tend to be increments of duration more than of crest-height 



Fig. 2. — Similar to fig. 1 , but the break-shock reflexes evoked from internal saphenous 

 nerve instead of popliteal. The nunaerals at each inset give the coil distances for 

 the break-shock. The two lowest insets show the maximal twitch elicited vid 

 motor nerve direct with the coil distances for the break-shock employed. Time 

 ordinates and tension abscissa as in iig. 1. Stimulus-signal below. 



(figs. 2 and 7). With these strong stimuli the period of declining tension 

 tends to be drawn out and to exhibit irregular undulations. 



The above description applies to the spinal preparation as employed in 



