Perhaps you should try some spelling variations:
decrease response » decreased response (Expand search), increased response (Expand search), increases response (Expand search)
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)
owing decreased » loading decreased (Expand search), with decreased (Expand search), in decreased (Expand search)
decrease owing » decrease lodging (Expand search), decrease during (Expand search), decrease in (Expand search)
decrease that » decrease the (Expand search), decrease at (Expand search), decrees that (Expand search)
that decrease » that increase (Expand search), that increases (Expand search), not decrease (Expand search)

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

• Removing quotes may allow a broader search: (( decrease owing decreased mental processing ) OR ( decrease response decrease that decrease ))~.