The NFL’s concussion protocols are once again under scrutiny after Panthers quarterback Cam Newton took multiple hard hits to the head on Thursday night but did not leave the game.

The NFL, however, says that the league’s protocols worked as they should, with multiple members of the medical staff observing Newton, seeing no indication that he had suffered a concussion, and therefore allowing him to keep playing.

“There was communication between medical personnel on the Carolina sideline, including the unaffiliated neurotrauma consultant, and the two independent certified athletic trainer spotters in the booth,” the league said in a statement.