CATS defender Tom Lonergan says he is "slowly coming good" after suffering concussion in the win over Gold Coast at Simonds Stadium last weekend.

Lonergan, who was knocked out when he copped an accidental knee in the head from Suns big man Sam Day, spoke to K-Rock radio on Thursday morning.

"The first couple of days - Monday, Tuesday – were very slow. Didn’t do much at all," he said.

"Yesterday [Wednesday] was probably the same as well.

"It’s been a quiet few days."

The 30-year-old will be closely monitored during the rest of the week.

However, he appears unlikely to line up against North Melbourne in Sunday's big clash at Simonds Stadium.

"I will head into the club today, be assessed by the doctors and see how I go," Lonergan said.

"I’ve still got a little bit of time before the game. We’ll wait and see."