Why can mental distraction dull physical pain?

irishtimes.com — THAT'S THE WHY:HAVE YOU ever noticed that taking your mind off a pain can sometimes help to cope with it? Why could a mental distraction help lessen the physical sensation? Research in Germany suggests that distraction can inhibit the response to incoming pain signals as the central nervous system starts to process them.
Why can mental distraction dull physical pain? t.co/jKKib5E7 via @IrishTimes and me >> for the pm crowd