All tests were negative and Komets defenseman Kevin Hansen was discharged from Parkview Hospital at about 4 a.m. Thursday.
According to general manager David Franke, Hansen is experiencing soreness in his head, neck and shoulder, and he will not play this weekend.
Hansen could return to the lineup Wednesday at Bloomington, Ill., but that depends on how he feels.
Hansen was injured when he was checked from behind and driven headfirst into the boards by Muskegon's Justin Rohr in a 4-1 Komets victory.
The Komets play at Muskegon, Mich., on Friday night. They may activate defenseman Brandon Warner, who separated his shoulder Dec. 28, to take Hansen's spot in the lineup.
-- By Justin A. Cohn, The Journal Gazette