North Queensland are likely to be without star playmaker Michael Morgan for an extended period after his second concussion in a fortnight left him dazed and groggy after Origin III.

Morgan was seen to be shaking on the turf after taking some friendly fire from Maroons and Cowboys teammate Josh McGuire's elbow in the second half at ANZ Stadium.

That contact came just 13 days after Morgan was hit by Tariq Sims, a shot that cost the Blues forward a place in the victorious game-three team and earned him a one-week ban.

North Queensland play the Roosters in Gosford on Sunday and Morgan did not travel back to Townsville on Thursday. He remained in Sydney and won't be seen by North Queensland medical staff until Friday.