Canadian Twins Share a Brain and See Out Of Each Other’s Eyes

Krista and Tatiana Hogan, from British Columbia in Canada, are unique in that they’re joined at the head and are connected by a thalamic bridge that gives them neurological capabilities that researchers are only now beginning to understand. Still, they're like other 14-year-olds — they attend school, have a favorite pet, and are part of a loving family. Craniopagus twins — joined at the head — are a rarity and the vast majority don't survive 24 hours. A CT scan of the twins showed they could never be separated due to the risk of serious injury or death because their brains are connected. The girls share the senses of touch and taste, and even control each other'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 if they choose. The twins say they know each other's thoughts without having to speak, but they have very different personalities. Tatiana is outgoing, talkative and high strung, while Krista is quieter, more relaxed and loves to tell jokes. One thing the twins agree on is that they’re determined to live each day to the fullest.