Conjoined twins can see through each other's eyes

08:22, June 22, 2010      

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The craniopagus conjoined twins of Krista Hogan and Tatiana Hogan in Canada.

There are lots of twins around the world, but Krista Hogan and Tatiana Hogan are unique because they can see things through each other's eyes out of a conjoined head.

The two sisters, born on Oct. 25, 2006, are craniopagus conjoined twins. They are joined at the top, backs, and sides of their heads. They were born in Vancouver, British Columbia, Canada, and are the only un-separated craniopagus twins currently alive in Canada.

Doug Cochran, a Canadian pediatric neurologist, said: "The twins are the only pair of conjoint people using common brain nervous tissue, and their connected nervous tissues make them whole."

The sisters have different sleeping habits, independent hearing, seeing and touch. Sometimes, their movements might be interrupted by the conjoint body, but otherwise they function normally.

Due to the shared nervous tissue, the twins have special abilities when communicating with each other. Her mother said they share something that most conjoint twins cannot share: they can see a different world through each other's eyes.

According to statistics, most conjoint twins were dead within 24 hours after they are born. But Krista and Tatiana have already marked their third birthday.

However, the state of health for both sisters is not optimistic. The twins both caught pneumonia, Krista suffered epileptic seizures once and Tatiana was diagnosed with high blood pressure because of cardiac hypertrophy. Both have undergone surgery due to diseases.

Doctors had discussed the possibility of separating them several times. But since they cannot completely deal with the problem of the common nervous tissue, the risks of the operation are too high. Thus, Mr. and Mrs. Hogan decided not to attempt to separate them any more.

By People's Daily Online/Agencies

(Editor:王寒露)

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http://english.people.com.cn/90001/90782/90872/7033831.pdf