Brad Duchaine

And VS used to see faces perfectly normally.

Then one day he woke up and was seeing these faces.

And he thought maybe he'd died and gone to hell.

He didn't know what was going on with these faces.

scary looking faces that he was experiencing.

Now, what you mentioned probably is true for some people.

There probably are some people out there who see face distortions their entire life.

And so they just think that's how faces look.

Sure, yeah.

So one of the most interesting types of PMO is what's called hemipmo.

And in hemipmo, it's just one half of the face that's distorted.

And so we work with a South African man.

When he looks at a face, the right side, from his perspective, distorts so that he sees some discoloration on the side, the cheek goes out, the right eye shifts down and to the outside, and then there's slight pulling on the mouth and on the nose.

Okay.

And he'll see this on every face that he encounters, including his own face, of course, when he looks in the mirror.

No, it absolutely does.

And it told us something that we didn't realize before.

So what it tells us is the two halves of the face, even though when we look at them, they feel like we're looking at this seamless representation, the two halves are actually represented separately from one another.

And what we know is that actually what you're seeing on the right side of the face is processed in the left hemisphere.

The left side is processed in the right hemisphere.