“Joined at the head, their brains are connected by a thalamic bridge which gives them neurological capabilities that researchers are only now beginning to understand… Krista and Tatiana Hogan share the senses of touch and taste and even control one another’s limbs. Tatiana can see out of both of Krista’s eyes, while Krista can only see out of one of Tatiana’s… Tatiana controls three arms and a leg, while Krista controls three legs and an arm. They can also switch to self-control of their limbs…”
The comments are interesting too, but are generally beyond my pay grade.
https://uncommondescent.com/intelligent-design/11-year-old-conjoined-twins-have-a-connected-brain-see-through-each-others-eyes-but-have-separate-minds/