Watch: Woman Plays Flute in the Middle of Brain Surgery

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Medical staff, who were not involved in this story, examine information involving a man who is undergoing radiation therapy to treat brain abnormalities. Bertrand Langlois/AFP/Getty Images

Updated | Playing the flute is something Anna Henry was unsure she'd ever be able to do again. Complications from a hand tremor were so severe she couldn't play her favorite instrument. But on March 27, Henry wasn't just able to play her favorite classical tunes again, she was able to play while undergoing brain surgery.

Henry, 63, successfully performed a song while undergoing deep brain stimulation at Memorial Hermann-Texas Medical Center in Houston, Texas according to TMC News, the news organization of the Texas Medical Center.

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In the video below, she's seen playing each note, as doctors and nurses stand by her side. Prior to surgery, her hands were too unstable to play her favorite instrument, but when medical staff handed over her flute while she was awake, she didn't experience a single detectable tremor. She could write clearly for the first time in decades, too.

Since she was in middle school, Henry has suffered from a common movement disorder known as essential tremor. It causes her dominant left hand to shake so badly that she can't write, play the flute, or use her hand for other simple motions. Doctors attempted to alleviate her symptoms with various types of drugs, but none worked.

About four years ago, her neurologist presented her with the option of deep brain stimulation.

"[Deep brain stimulation] works amazingly well," Dr. Mya Schiess, Henry's neurologist who works at the Mischer Neuroscience Institute at Memorial Hermann-Texas Medical Center and UTHealth, told TMC News. "If you have a tremor that is truly interfering with hand function, lifestyle, head or voice, honestly, there isn't a medicine out there that's going to really put you in a better state."

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During deep brain stimulation, a patient has electrodes, which emit electrical currents implanted in their brain. It's currently approved by the Food and Drug Administration for essential tremor, Parkinson's disease, dystonia and obsessive compulsive disorder. The procedure is also being studied as a treatment for other conditions such as major depression and addiction, according to Mayo Clinic.

This story has been updated to attribute the source of the video to TMC News, the news organization of the Texas Medical Center.

Watch: Woman Plays Flute in the Middle of Brain Surgery | Tech & Science