Baylor, known for research into personal genome sequencing, discovered that was Alexis' problem. The two best-known gene culprits weren't causing her dystonia. It was a different genetic mutation that lowered her body's levels of another brain chemical, serotonin, as well as dopamine, scientists reported in the journal Science Translational Medicine.
With that finding, doctors added to Alexis' daily treatment a serotonin-producing medication that stopped her airway spasms and let her get back to sports. Noah had the same gene defect despite no breathing problems, but the twins' mother says the medication helped improve his hand-eye coordination and ability to focus.
Now, "they're full of joy and full of life," Retta Beery said.
The Associated Press