Perhaps you should try some spelling variations:
mental processing » central processing (Expand search), minimal processing (Expand search), mineral processing (Expand search)
during depressed » during depressive (Expand search), during repressive (Expand search), feeling depressed (Expand search)
decrease mental » decreased mental (Expand search), decrease fetal (Expand search), decrease renal (Expand search)
decrease during » increase during (Expand search), increases during (Expand search), increased during (Expand search)
depressed pro » depressed to (Expand search), depressed person (Expand search), depressed mood (Expand search)
decrease and » decreases and (Expand search), decrease in (Expand search), decrease of (Expand search)
and decrease » and decreases (Expand search), and decreased (Expand search), and increase (Expand search)
pro decrease » to decrease (Expand search), or decrease (Expand search), price decrease (Expand search)

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (( decrease AND decrease mental processing ) OR ( decrease during depressed pro decrease ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( decrease and decrease mental processing ) OR ( decrease during depressed pro decrease ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease and decrease mental processing ) OR ( decrease during depressed pro decrease ))*.