Perhaps you should try some spelling variations:
replacing effect » reporting effect (Expand search), spacing effect (Expand search), reducing effect (Expand search)
decreased brain » increased brain (Expand search), decreased in (Expand search), decreased base (Expand search)
brain decrease » brain decreases (Expand search), brazil decrease (Expand search), strain decrease (Expand search)
akt decreased » and decreased (Expand search), are decreased (Expand search), not decreased (Expand search)
decrease akt » decrease at (Expand search), decrease after (Expand search), decrease with (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)

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 akt decreased brain decrease ) OR ( decrease AND decrease replacing effect ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( decrease akt decreased brain decrease ) OR ( decrease and decrease replacing effect ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease akt decreased brain decrease ) OR ( decrease and decrease replacing effect ))*.