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Dec. 4, 2025 - Epoch Times
01:55
What Twins Conjoined at the Head Tell Us About the Brain and the Soul | Neurosurgeon Michael Egnor
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The studies of twins who are conjoined at the head and share brain activity hasn't been as systematic as one would like, but there's a lot that's known about them.
They're quite rare.
The ones that are probably the best known are Tatiana and Krista Hogan, who are twin girls who live in British Columbia.
And they were born joined at the skull.
And they have what's called a phalamic bridge, which is a bridge of brain tissue that connects the deepest parts of their brains.
So their brains connect.
And they can do some remarkable things.
They can see at least partially through each other's eyes.
They can feel to some extent each other's skin.
There's a video, actually, of their mother sitting with them on a couch, and the girls close their eyes, and the mother will touch one girl's hand, and both girls will say, you're touching the hand.
One girl will say, you're touching my hand.
The other girl says, you're touching my sister's hand.
They share some motor control over each other's limbs.
They can share emotions.
And they seem to share memories to some extent.
But as far as we know, they don't share reason and free will.
First of all, they have different personalities.
They get into fights.
They have different opinions on them.
And they both have to go to school.
Meaning, they both have to study.
It's not like one girl can sit there learning her times tables and the other girl who's attached can just watch TV, but she knows the times tables too.
So again, we see this dichotomy between reason and free will and all the things that the brain does.
And they show that even if you have connected brains, your reason and free will is separate because they have separate souls.
They have brains that are connected.
But they're separate human beings.
They're separate persons and they have separate souls.
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