Coach Dan Quinn says Coleman was at team headquarters when he fell on Wednesday.
Coleman, a third-round draft pick from Indiana, did not practice on Thursday, but Quinn has yet to rule him out. If Coleman can't play Sunday when the Falcons (7-7) host Carolina (14-0), Terron Ward will take his place behind Pro Bowl starter Devonta Freeman.
Coleman is averaging 4.5 yards on 87 carries this season.
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