Manny Pacquiao chin will no longer be the same, read this about punch resistance

This is an article about MMA fighter Roy Nelsons granite chin, but its a good read. They ask a Doctor about ability to take a punch. this is why Pacman will never be the same again he was concussed out cold for the first time in his life, being knocked out cold is much different than being knocked out but still awake. He will never be the same And once you get knocked out the first time, you’re definitely more susceptible to getting knocked out again; you’re more vulnerable to worse concussions. The theory is that, although your body can reset those ionic concentrations inside and outside the cell, each time that happens, maybe it loses a little bit of its efficiency. So your ability to recover isn’t quite as good as it was before that happened. So it’s like you have a gate, it gets broken, and you repair it but the repair might not be quite as strong as the original and it never holds together as well as it once did. This is the reason I believe boxing is far more dangerous than MMA. I’ve been the ringside doctor for many boxing and MMA matches, and I have no doubt that boxing is more dangerous than MMA. The whole point of MMA is that there are multiple targets, multiple ways to attack and I don’t think there’s quite as many repetitive blows to the head as you see in boxing. That’s the only target and the only weapon is your fist and it’s going to the same spot every time. When you look at the cumulative data, boxing has a higher risk of traumatic brain injury than we’re going to see in MMA. From a medical point of view, it’s still early to form conclusions about MMA, but just based on the actual blows to the head and the type of blows--boxing tends to be more circular based on the shape of the glove and the way the hands are taped; it’s a more circular blow. So you have a lot more of the rotational forces then you do in MMA, where the punches seem to be a little more linear. http://fightland.vice.com/blog/fight-doctor-big-countrys-granite-chin