severely demented patients had significantly lower acetylcholinesterase ( p less than 0.01 ) and butyrylcholinesterase ( p less than 0.05 ) activities in csf than the controls had , but the activities of these enzymes in plasma and erythrocytes were within the same range in both groups .
C0001044
acetylcholinesterase
C0008429
butyrylcholinesterase