2381
The present study was designed to evaluate the effects of chronic fluorosis on the dynamics ( including fusion and fission proteins ) , fragmentation , and distribution of mitochondria in the cortical neurons of the rat brain in an attempt to elucidate molecular mechanisms underlying the brain damage associated with excess accumulation of fluoride .
 Chemical: fluoride
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: fluoride