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“They’re not just getting flickers of movement. They’re getting something important,” said Dr. Jason Carmel, a Columbia University neurologist who wasn’t involved with the new experiment but also studies ways to recover upper-limb function. “It’s a very exciting proof of concept.” But upper-limb paralysis has gotten little attention and is inherently more challenging. The brain must signal multiple nerves that control how the shoulder lifts, the wrist turns and the hand flexes. Stroke damage makes it harder for those messages to get through.
“We’re not bypassing their control. We’re enhancing their capabilities to move their own arm,” he said.Article content Rendulic, now 33, was performing some fine-motor tasks for the first time since suffering a stroke in her 20s. That unusually young stroke, caused by weak blood vessels that bled inside her brain, initially paralyzed her entire left side. She learned to walk again but — with the exception of those four weeks with spinal stimulation — cannot fully open her left hand or completely raise that arm.
While bigger and longer studies are needed, the new results “are really promising,” said Mayo Clinic assistant professor Peter Grahn.
For people that can't figure out their gender some zaps to the brain could help
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