Task: Text Categorization
Input (English): Question: The afferent neural activity of the peripheral nocioceptors is modulated in the dorsal horn of the marrow, which acts as a door that prevents or does not allow the passage of nerve impulses that come from the nocioceptors and the cortex, refers to? 
 Options:  <0> The peripheral nervous system. <1> The theory of the door. <2> Chronic stress <3> The theory of climbing. <4> The biological process of relaxation.
Output (English): psychology