Perhaps you should try some spelling variations:
decreased spiral » decreased sperm (Expand search), decreased glial (Expand search), decreased neural (Expand search)
spiral patterns » spiral pattern (Expand search), spectral patterns (Expand search), spatial patterns (Expand search)
in decreased » is decreased (Expand search), in deceased (Expand search), and decreased (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), to decrease (Expand search)
decrease at » decrease akt (Expand search), decrease and (Expand search), decrease of (Expand search)
at decrease » rate decrease (Expand search), that decrease (Expand search), and 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 OR decrease at decrease ) OR ( decrease in decreased spiral patterns ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( decrease or decrease at decrease ) OR ( decrease in decreased spiral patterns ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease or decrease at decrease ) OR ( decrease in decreased spiral patterns ))*.