Andy McDonald is no longer experiencing concussion symptoms. He has resumed skating and there is no timetable for his return, according to Blues General Manager Doug Armstrong.

In addition, David Perron is still experiencing concussion symptoms but says his condition is improving. Perron will begin light excercise to see how his body responds while he tries to recover from a concussion.

After weeks of nothing new to report, news of the players' progress was delivered during the first intermission of Thursday's 4-3 overtime loss to Detroit.

"We've turned the corner with Andy (McDonald)," Armstrong said. "Both players have passed initial baseline tests by the NHL and NHLPA protocol. Andy has been on the ice the last two days and is feeling much better."

"David (Perron's) situation is a little bit different. He wouldn't be as far along as Andy," Armstrong said. "David still has some symptoms but there's been a desire and some indication that light excercise can be induced to see how that affects (him)."

McDonald has been out of the lineup since sustaining a concussion on Dec. 4 in Edmonton. The Blues forward hit a rut in the ice and crashed into the leg of Oilers forward Shawn Horcoff in overtime.

He was placed on injured reserve on Dec. 16, retroactive to the injury.

Perron was injured Nov. 4 vs. San Jose. As he skated through the neutral zone, he didn't see Sharks forward Joe Thornton coming out of the penalty box and was hit. He finished the game and scored a goal in a 2-0 victory but he reported concussion symptoms the next day and has been out of the lineup since.

Perron was placed on injured reserve on Dec. 1, retroactive to the injury.

"The toughest thing is you don't get to come to the rink," Perron said. "It might sound weird, but that's probably the toughest thing. It's not the headaches and all that, but it's not being able to skate and be with your teammates."