1401
We used paired pulse protocols assessing short intracortical inhibition ( SICI ) and intracortical facilitation ( ICF ) to asses cortical excitability over the primary motor cortex and Short Latency Afferent Inhibition ( SLAI ) protocols , to verify the effects of the drug on central cholinergic transmission in a group of AD patients compared to age - matched controls .
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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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