Detroit coach Rod Marinelli said Monday the team would wait for results of the exam before exploring other options for a starting quarterback.
After Culpepper was hurt, Drew Henson was sacked on the final play Sunday.
Dan Orlovsky hopes to be healthy enough to play this week after being out for a month with a wrist injury.
Drew Stanton has been sidelined for two weeks with a concussion, but is expected to be ready to play if necessary.
The Lions (0-13) will close at Indianapolis, against New Orleans and at Green Bay hoping to avoid being the NFL's first 0-16 team.
Copyright 2008 by The Associated Press.