0\ THK MAMMALIAN NERVOUS SYSTEM. 



319 



different cases varied according to the seat of the stimulus which evoked the cord 

 change. This seat may be either (A) Brain, (B) Nerve, or (C) Cord, and the cases 

 in which we specially noted this change are as follows : 



A. CORTICAL Excitation. Cord connected with Cortex. 



B. NERVE Excitation (sciatic). Cord severed from Cortex. 



