On Feb. 4, Thornton was reported as being free of concussion symptoms, to the point that he was even able to do some biking and skating. He did not participate in the Bruins team practice, though.
Coach Claude Julien said that Thornton was doing really well with no issues, but stressed the importance of following the set protocol about concussions. As such, he added that Thornton is very doubtful for the game on Feb. 6 against the Montreal Canadiens.
However, the next game after that is on Feb. 9, which would be nine days after he got the concussion and within the estimated seven to 10 day timetable for recovery, so he could very well be back in the lineup by that time.