Perhaps you should try some spelling variations:
mental processing » central processing (Expand search), minimal processing (Expand search), mineral processing (Expand search)
burden decreased » buffer decreased (Expand search), between decreased (Expand search), burgers decreases (Expand search)
decrease mental » decreased mental (Expand search), decrease fetal (Expand search), decrease renal (Expand search)
decrease burden » disease burden (Expand search), decrease further (Expand search)
decreased brain » decreases brain (Expand search), increased brain (Expand search), decreased in (Expand search)
brain decrease » brain decreases (Expand search), brazil decrease (Expand search), strain decrease (Expand search)
decrease can » decrease in (Expand search), decrease and (Expand search), decrease at (Expand search)
can decrease » can increase (Expand search), and decrease (Expand search), to decrease (Expand search)

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

• Removing quotes may allow a broader search: (( decrease can decrease mental processing ) OR ( decrease burden decreased brain decrease ))~.