Perhaps you should try some spelling variations:
blood decreased » food decreases (Expand search), also decreased (Expand search), showed decreased (Expand search)
fear processing » pear processing (Expand search), fur processing (Expand search), after processing (Expand search)
decrease blood » decreases blood (Expand search), decreased blood (Expand search), increase blood (Expand search)
decreased fear » decreased heart (Expand search), decreased mean (Expand search), decreased after (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)
decrease at » decrease akt (Expand search), decrease in (Expand search), decrease of (Expand search)
at decrease » rate decrease (Expand search), that decrease (Expand search), not 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 blood decreased fear processing ) OR ( decrease AND decrease at decrease ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( decrease blood decreased fear processing ) OR ( decrease and decrease at decrease ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease blood decreased fear processing ) OR ( decrease and decrease at decrease ))*.