Robert Griffin injured Robert Griffin tries to slide in Sunday’s game against the Atlanta Falcons but is injured on the play (Toni Sandys/The Washington Post)

Quarterback Robert Griffin III said after participating in the Washington Redskins’ practice Wednesday that he’s had no recurrence of concussion symptoms since he left the locker room Sunday after the Atlanta Falcons game at FedEx Field.

   “I felt good,” Griffin said.

   Griffin said he underwent further testing after Wednesday’s practice, he said.

   He is not yet cleared for contact, Griffin said. But he said he’s optimistic that he will play in Sunday’s home game against the Minnesota Vikings.   “There’s never a doubt as a player,” Griffin said.

   He said he is respectful of the medical evaluation process and understands that trainers and doctors are looking out for his best interests.   “The only symptom I do have is irritability because they keep asking me the same questions,” he said.

   Griffin left Sunday’s loss to the Falcons in the third quarter after absorbing a hit to the head as he ran with the ball toward the sideline.  “I felt fine when I left the locker room” Sunday, Griffin said.

   Griffin said he plans to make some changes to his playing style but won’t overhaul it completely.  “It doesn’t make you less aggressive,” Griffin said. “But it’s a learning lesson… Life is more important than the game of football.”

   Griffin said he tried to get down to the turf too late on the play that resulted in his injury. In  a similar situation in the future, he would be smarter and get out of bounds or throw the ball away, he said.

   He said he ran out of bounds during Wednesday’s practice and received an ovation from his teammates for imitating a slide at the end of a run.  “I don’t have anything to prove,” Griffin said.