The Otherworldly Alien Hand Syndrome, Animated

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Alien hand syndrome (AHS) is a condition in which a person experiences their limbs acting seemingly on their own, without control over the actions. The term is used for a variety of clinical conditions and most commonly affects the left hand.

Karen Byrne’s left hand sometimes operates on its own terms. It has unbuttoned shirts and stubbed out cigarettes, without her permission. Oh, and a few times, her own hand has slapped her across the face.

This is a documented medical occurrence, not a premise for a Jim Carrey movie. The condition’s name? Alien hand syndrome.

Invisibilia featured Byrne and her alien hand last summer, and Giant Ant Studios recently created an otherworldly animation of Byrne’s story.

Byrne says she’s gotten used to her left hand’s new attitude, but alien hand syndrome is a pesky, strange condition.

Imagine, as another patient has reported, sitting down to play the piano, only to have one hand levitate far above the piano keys as you try to practice. It’s not that you’ve changed your mind; your goal is still to play a sonata. But that hand — still yours, and now also not yours — is obeying new directions, and you didn’t come up with them consciously.

For the pianist and Byrne, and many other cases, alien hand symptoms appears rooted in disruption of communication through the corpus callosum. That’s the set of fibers that connects the right and left sides of the brain.

The pianist’s corpus callosum showed missing connections on an MRI, and Byrne’s left hand developed its disobedience after a surgeon severed her corpus callosum in an operation to treat epileptic seizures. To read more from MENAKA WILHELM, click here.