Perhaps you should try some spelling variations:
processes affect » processes effect (Expand search), processes effects (Expand search), processes after (Expand search)
decay processes » levy processes (Expand search), memory processes (Expand search), decay properties (Expand search)
decrease pain » decreases pain (Expand search), decrease in (Expand search), decreased brain (Expand search)
decrease or » decrease of (Expand search), decrease on (Expand search), decrease pro (Expand search)
or decrease » of decrease (Expand search), not decrease (Expand search), _ decrease (Expand search)
decrease to » decreased to (Expand search), decrease toc (Expand search), decrease the (Expand search)
pain decay » pain delays (Expand search), in decay (Expand search), pion decay (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 OR decrease to decrease ) OR ( decrease pain decay processes affect ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( decrease or decrease to decrease ) OR ( decrease pain decay processes affect ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease or decrease to decrease ) OR ( decrease pain decay processes affect ))*.