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What is so unique about these particular twins?

Tatiana and Krista Hogan are unique because of the bridge between each of their thalamus connecting their brainstems. This has created an interesting situation where doctors are finding that each of their brains can receive signals from the others brain. In essence, Tatiana can see through Krista’s eyes because the optic nerve splits into two courses and due to the bridge between the thalamus what Tatiana is seeing is registering to Krista even though she isn’t actually seeing it herself, and vise versa.

How does this case relate to the "binding problem?" This case relates to the binding problem due to perception and sensory processes in the brain. Because Tatiana and Krista share a portion of their brain as well as having the bridge between their thalamus how or whose sensory input does the brain recognize. According to an article in Science Direct visual processing systems are segregated, things like color, motion, location and object are processed in separate areas of the brain (Roskies, 1999). For example, each of the twins individually have an operational optic nerve that relates information to their brain of what they are seeing, but if they are both looking at the same thing, can their brain perceive an object or color differently than the other? Or does one twins visual or taste determine how the other will see or taste it?

Roskies, A. L. (1999). The Binding Problem. Neuron,24(1), 7-9. doi:10.1016/s0896-6273(00)80817-x...