David Amerson, right, celebrates an interception returned for a score with Brandon Meriweather during the team’s win last month against Oakland. Amerson has been dealing with concussion symptoms this week. (Marcio Jose Sanchez/Associated Press)

Washington Redskins cornerback David Amerson made additional progress as he continues to be monitored for concussion-like symptoms, Coach Mike Shanahan said Thursday.

Amerson passed another round of tests, and took part in drill work during Thursday’s practice. If Amerson passes his final test on Friday and practices without any setbacks, he likely will play Sunday against Chicago. Amerson left last week’s game at Dallas with a concussion after getting knocked out by Dallas linebacker Cameron Lawrence while on kickoff coverage. Lawrence received a $21,000 fine for the blind-side helmet-to-helmet hit.

Redskins tight end Fred Davis (ankle), center Will Montgomery (knee), tight end Logan Paulsen (knee), Jerome Murphy (ankle), linebacker Brandon Jenkins (ankle) and nose tackle Chris Neild (calf) all practiced fully despite receiving treatment for injuries. Neild had missed all of last week’s practices and the Dallas game with a calf injury. He practiced in a limited capacity on Wednesday.

According to the Chicago Bears’ injury report, tight end Martellus Bennett (knee), cornerback Charles Tillman (knee), linebacker James Anderson (back) and defensive tackle Stephen Paea (toe) all were limited in practice Thursday. Safeties Anthony Walters (hamstring) and Major Wright (knee) both practiced fully. Linebacker D.J. Williams already has been ruled out for the game because of a chest injury.