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For the Hogan twins, this raises the interesting possibility that they may share both sensory experiences and conscious thoughts.
As fantastic as it sounds, there is little doubt in [neurosurgeon Douglas] Cochrane's mind that the girls share some sensory impressions. When they were 2 years old, he performed a study in which Krista's eyes were covered and electrodes were glued to her scalp. While a strobe light flashed in Tatiana's eyes, Krista was emitting a strong electric response from the occipital lobe, which is where images are assembled. The test also worked when the girls switched roles. The results were not published, and some neuroscientists believe that this kind of test, which measures changes in brain activity beneath the skull, is imprecise in determining what region of the brain is at play; but most would agree that any response in the other twin's brain suggests, at a minimum, connectivity.
The explanation Cochrane proposes is surprisingly straightforward for so unusual an outcome: that visual input comes in through the retinas of one girl, reaches her thalamus, then takes two different courses, like electricity traveling along a wire that splits in two. In the girl who is looking at the strobe or a stuffed animal in her crib, the visual input continues on its usual pathways, one of which ends up in the visual cortex. In the case of the other girl, the visual stimulus would reach her thalamus via the thalamic bridge, and then travel up her own visual neural circuitry, ending up in the sophisticated processing centers of her own visual cortex. Now she has seen it, probably milliseconds after her sister has.
I'm somewhat unnerved by the family's circumstances, though, and the thought of making their lives a "reality show" is somehow quite distasteful... but as the longer article said, they need the money (are receiving welfare now), and the girls would "never have a normal life anyway". A talent scout is courting them? Really?
How "far behind" are they developmentally?
intellectual poverty, and perhaps a failure to make the most of the extraordinary people/person they are.
One other random thought: For as close as they are to being one individual, and even seeing what the other sees, they can never look each other in the eye unless they use a mirror. But then, we can never look ourselves in the eye anyway.
Exceptionally interesting story. Thanks for sharing it. S/F
They show the mom covering one girl's eyes, and showing a toy to the other, and asking the blindfolded one "what is mommy holding?". Yep, they see what each other see; they feel what the other's foot feels being tickled.
I can't help but think about their plight if they grow to maturity. How would that work with hormones, sexuality...wow. I wonder if there are any cases of this type that are boy/girl twins. Yikes.
The family is so cavalier about the whole thing -- weird. But then, I have no room to speak about it. Still, do you wonder (like I do), if they are getting auxiliary coaching on how best to parent them? There was no mention of life expectancy.
And then it brings up the question of....if I found out during the pregnancy, what would I decide to do? It would be a very difficult problem to work through, for me.
One of the issues I have with modern medicine is that in my thinking, there is a fine line between sustaining life/lives that without medical care would not survive.
I'm having a little trouble wrapping my head around it (ugh ).
Originally posted by wildtimes
Ophi, still, how would they know the difference between what is "their" thought, and what is the other's thought?