Symptom-free and raring to go — that’s the way Bruins forward Shawn Thornton described himself yesterday nearly a week after suffering a concussion in a fight with Buffalo’s John Scott. Thornton was hundreds of miles from his Bruins’ teammates as they took on the Montreal Canadiens last night. And if everything goes well with the team doctors upon their return, he believes that he will be back on the ice sooner rather than later. “The noggin feels pretty good,” Thornton said at a Gillette promotion outside the Prudential Center. “I skated the last three days. I rode the bike on Sunday and I’m symptom-free right now, so I will re-evaluate with the medical staff when they get back from Montreal (today) and go from there.” Thornton said he didn’t have any major symptoms, like sensitivity to light or uneasiness on his feet, but he could tell that something was different after getting peppered with a series of right hands from the 6-foot-8 Scott in the first period of the Bruins’ 7-4 loss on Jan. 31. “I knew when I got hit behind the ear my legs went from out from underneath me that something was wrong,” said Thornton. “I just didn’t really feel right in the box. That’s why I skated right off when I went across the ice.” NHL protocol states that a player suspected of suffering a concussion must be removed from the game and examined by the team physician. Thornton was initially reported to be out 7-to-10 days, and he said he has just tried to gauge how he felt every day since suffering the injury. He put no timetable on his return. “You just go by how you feel, for myself anyway,” Thornton said. “I was actually going stir-crazy (on Saturday), so I was out walking up and down Newbury Street getting some fresh air. I felt good since then, so I asked if I could ride the bike on Sunday and get things going. So yeah, I feel good.”