Bruins defenseman Johnny Boychuk had a MRI taken on his back Friday and it showed no fractures, according to head coach Claude Julien.

Julien explained the injury was the result of Boychuk's back "locking up" due to a muscle spasm after he was on the receiving end of boarding hit early in the first period of Thursday's loss to the Canadiens in Montreal.

He had to be helped off the ice on a stretcher.

If he continues to progress, it's possible he could miss only three to seven days.