By MICHAEL GERSTEIN
Capital News Service
LANSING — It started slowly, when the Traverse City Regional Psychiatric Hospital shut its doors in the mid-1980s. Then in the 1990s, 10 more folded in rapid succession. And like the last teetering blocks in a long line of dominoes, Northville Regional Psychiatric Hospital fell in 2003 and the Mt. Pleasant Center in 2009. Now, the state continues to grapple with lasting effects of those closures.