805
For this , ERK activity was elevated by expressing constitutively - active MEK1 ( CA - MEK1 ) , an ERK upstream activator , in cortical neurons ( Fig . S3 ) .
 Anatomy: cortical neurons
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Anatomy 
Text: {0} 
Answer:
 Anatomy: cortical neurons