Story highlights The patient was awake during the four-hour procedure to fix cramping in his fingers

The surgeon performed "radio-frequency ablation" to correct a rare condition

(CNN) Guitar players can strum almost anywhere, from a beach to a park bench to an operating room -- while undergoing brain surgery.

That's where Abhishek Prasad peddled his musical wares during a four-hour surgery in India that aimed to correct cramping in his fingers, his surgeon said.

For 20 months before the July 11 procedure, Prasad had suffered from a neurological condition called musical dystonia, said Dr. Sharan Srinivasan, head neurosurgeon at the Bhagwayn Mahaveer Jain Hospital in Bangalore.

"This is a form of a task-specific movement disorder, which comes out only when playing a musical instrument," he said. "In his case, ... it was the cramping of three fingers, middle, ring and little, on his left hand because of the misfiring circuits in his brain."

Whenever Prasad played the guitar, his fingers would get stuck. Not anymore.

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