REFLEX ACTION 509 



the,m of the conditioned reflex, that is, food, fails to be presented after a number 

 T of repetitions of the stimulus for the conditioned reflex. 



Other interesting examples of inhibition will be found in the text. 



'^Certain forms of conditioned reflex obtain the mastery over nociceptive reflexes, 

 contrary to the case of spinal reflexes. Thus, a painful stimulus can be made into 

 the sign for a conditioned reflex, and then ceases to be painful. 



Removal of portions of the cortex affects permanently the possibility of 

 conditioned reflexes in which these portions take part normally. 



The bearing of the facts of inhibition on hypnosis and sleep is pointed out. 



LITERATURE 



Spinal Reflexes in general. 



Sherrington (1906, pp. 1-268). 



Irreciprocal Conduction. 

 Frohlich (1909, 2). 



Reciprocal Innervation. 



Sherrington (1909, 2). 



Rhythmic Reflexes. 



Graham Brown (1912). Forbes (1912, 2). Sherrington (1913, 1). 



Conditioned Reflexes. 



Pavlov (1910, 1911, 1912, 1913). 



