malformalady:

Naomi Elishuv had played for a number of orchestras, including Lithuanian National Symphony Orchestra, but was forced to stop performing professionally two decades ago when she began suffering from a condition called essential tremor. During the procedure which was performed under local anaesthetic, surgeons asked Elishuv to play so her brain was active. The footage shows Elishuv shaking and struggling to play the violin before she is wheeled into surgery. Surgeons are then seen operating on her brain behind a huge plastic curtain. As soon as the procedure is complete, the violinist’s hands become steady, and she is able to play unhindered for the first time in 20 years.