Perhaps you should try some spelling variations:
mental processing » central processing (Expand search), minimal processing (Expand search), mineral processing (Expand search)
decreased mental » decreased renal (Expand search), decreased mineral (Expand search), decreased total (Expand search)
their decreased » the decreased (Expand search), the decrease (Expand search), tumors decreased (Expand search)
decrease their » decrease the (Expand search), increase their (Expand search), decreases the (Expand search)
decrease will » decrease with (Expand search), decrease cell (Expand search), decrease il (Expand search)
decrease rate » decreased rate (Expand search), decreases rate (Expand search), decrease at (Expand search)
rate decrease » rats decreases (Expand search), rate increase (Expand search), to decrease (Expand search)

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "(( decrease their decreased mental processing ) OR ( decrease will decrease rate decrease ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease their decreased mental processing ) OR ( decrease will decrease rate decrease ))*.