Flexor-rejiex evoked by a Single Break -shock. 113 



Fig. 2. — De-afferented tibialis anticus (spinal preparation) ; top line, reflex response to 

 break-shock, coil at 35 cm. applied to central end of femoral nerve ; second line 

 from top, reflex to break-shock, coil at 12"5 cm., applied to external cutan-nerve ; 

 third line from top, reflex to break-shock, coil at 15 cm., applied to central end 

 of internal saphenous nerve ; and maximal twitch from break-shock, coil at 15 cm. 

 applied to peroneal nerve ; bottom line shows that twitch is already maximal under 

 break-shock with coil at 34 cm. Time in 0"01". 



Fig. 3. — De-afferented tibialis anticus (spinal preparation) ; top line, reflex to break- 

 shock, coil at 50 cm. applied to internal saphenous nerve ; second line, similar but 

 with coil at 20 cm., a maximal twitch is given for comparison with coil at 20 cm. 

 and stimulus of motor (peroneal) nerves ; bottom line, a twitch with motor nerve 

 stimulation (break-shock) at 40 cm., showing that twitch is already maximal. 

 Time in 0-01". 



