A concussion expert says Tua Tagovailoa's stiffened hands were 'primitive' response that suggests damage to brain's cortex

• Tua Tagovailoa was taken to the hospital with a head and neck injury.

• He stiffened his hands after hitting the ground.

• Chris Nowinski, a concussion expert, said that Tagovailoa showed signs of damage to the cortex, a part of the brain that processes information.

Dolphins quarterback Tua Tagovailoa slammed his head against the turf after being pulled to the ground in the second quarter.

Tagovailoa stiffened his hands with his fingers crossed.

Tagovailoa was taken to the hospital after he was carted off the field. The Dolphins said that Tagovailoa had movement in all of his limbs. He returned with the team.

There is debate over whether Tagovailoa's seized-up hands show that he experienced afencing response ordecorticate posturing.

Chris Nowinski is the CEO of the concussion Legacy Foundation.

When you have had a lot of damage to the cortex, it's usually seen in stroke. The movement is controlled by the brain stem.

He said that it had made his cortex no longer in control of his body. It works when you have a damaged cortex.

Tagovailoa appeared to have injured his head after a hit on Sunday. As he stood back up, Tagovailoa couldn't stay on his feet without help. The quarterback came back to the game after the half.

The Dolphins said that Tagovailoa had cleared concussion protocol and that he had a back injury.

After consulting with other experts, Nowinski decided that Tagovailoa's fencing posture was Decorticate.

There isn't unanimous opinion. The Chief Medical Officer of the National Football League said that Tagovailoa had "fencing posture."

A person's being can be affected by decrotication posturing.

Nowinski said it was serious. Deep involvement in the brain is what it is. It can change who you are.

The Dolphins kept Tagovailoa out of the Week 3 game against the Bills and in the run-up to Thursday's game.

He told reporters that he had no worries. I'm in constant contact with this man. There wasn't a single sign. There were no head injury symptoms for him. There was no indication from any of the resources that there was a problem with the head. I wouldn't have been able to live with myself if I had put someone in danger.

During the team's flight, Tagovailoa was awake and responsive, according to the coach.

Tagovailoa should not play again this season according to Nowinski.

We need to be careful." Nowinski hopes that we start to be cautious now. They're rolling dice with this future if he comes back again.

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