Conjoined Twins Share a Mind
Krista and Tatiana Hogan are four-year-old twins conjoined at the head, their brains linked by neural pathways that allow them to share the same physical experiences, their doctor says.
What's the Latest Development?
When, at the age of 20, Felicia Simms found out she was pregnant with twins conjoined at the head, her doctor offered her the option of terminating the pregnancy. Simms declined immediately and the babies were brought to term. Now, at the ages of four, her daughters Krista and Tatiana Hogan are wowing the scientific community with their unique brain structure—in many ways they share a mind—and giving sociologists an insight into how families cope with such diverse and challenging circumstances.
What's the Big Idea?
Krista and Tatiana's brains are connected at the thalamus, the part of the brain that regulates sensory experience, by a neural pathway that allows the twins to share experiences. "Because the thalamus functions as a relay station, the girls’ doctors believe it is entirely possible that the sensory input that one girl receives could somehow cross that bridge into the brain of the other. One girl drinks, another girl feels it. ...Tatiana and Krista are also a study in the more expansive neural system of sociology: the feedback loop of how their family responds to difference, how the world outside the walls of their home responds to the family’s response and how the girls respond in turn."
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Do you have a magnetic compass in your head?
A new study, led by psychologist Jean Twenge, points to the screen as the problem.
- In a new study, adolescents and young adults are experiencing increased rates of depression and suicide attempts.
- The data cover the years 2005–2017, tracking perfectly with the introduction of the iPhone and widespread dissemination of smartphones.
- Interestingly, the highest increase in depressive incidents was among individuals in the top income bracket.
On Thursday, New Zealand moved to ban an array of semi-automatic guns and firearms components following a mass shooting that killed 50 people.
- Gun control supporters are pointing to the ban as an example of swift, decisive action that the U.S. desperately needs.
- Others note the inherent differences between the two nations, arguing that it is a good thing that it is relatively hard to pass such legislation in such a short timeframe.
- The ban will surely shape future conversations about gun control in the U.S.
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