20187
To investigate the possible site ( s ) of action , we recorded spontaneous nerve activity and mechanically - evoked responses of central spinal cord dorsal horn neurons and compared these to spontaneous activity of peripheral dorsal root filaments in anesthetized SNL model animals .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
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