Conjoined twins can see through each other's eyes

08:22, June 22, 2010      

Email | Print | Subscribe | Comments | Forum 

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


  • Do you have anything to say?
  • Passengers wait for help after a coach skidded of an icy road in Xinghai county, Northwest China's Ningxia Hui autonomous region, Sept 28, 2011. The accident occurred at an altitude of 4,400 meters Wednesday morning and has trapped 41 passengers in the snow covered area. The coach was travelling from Xining city to Yushu county in Qinghai. (Photo/Xinhua)
  • A doctor takes blood sample of a girl for the dengue virus test at a hospital in east Pakistan's Lahore on Sept. 28, 2011. The death toll as a result of Pakistan's dengue fever outbreak continues to rise at alarming rates as at least 108 people have now been confirmed dead. The total number of people who have contracted the virus is reported to be at least 10,585 in Punjab, with 9,000 reported from Lahore. (Xinhua Photo/Sajjad)
  • Local pupils tie the rice at Jindai Botanical Garden in Chofu, Japan, Sept. 28, 2011. A group of pupils reap the rice they planted this May in Jindai Botanical Garden on Wednesday. (Xinhua/Kenichiro Seki)
  • A news conference on the nation's first space-docking procedure is held at the Jiuquan Satellite Launch Center in northwest China's Gansu Province, Sept. 28, 2011. The Tiangong-1, or "Heavenly Palace 1," is scheduled to be sent into space late Thursday to perform the nation's first space-docking procedure. (Xinhua/Wang Jianmin)
  • Actors perform during a dancing opera about Confucius (551-497BC), a Chinese thinker, educationist and philosopher, in Qufu, Confucius' hometown in east China's Shandong Province, Sept. 27, 2011. (Xinhua/Xu Suhui)
  • A volunteer greets journalists on the Media Public Day at Ellington field in Texas, the United States, Sept. 27, 2011. Journalists on Tuesday were invited to visit part of the airplanes for the upcoming air show. The 27th Houston Air Show will be held on Oct. 15-16 at Ellington field. (Xinhua/Song Qiong)