hazpat t1_isf7ph9 wrote
Reply to comment by CollectionOfAtoms78 in Man plays his saxophone through 9-hour, "very, very complex" brain surgery to remove tumor by BitterFuture
They can test an area before making a cut. They see a section they need to excise they test by touching it, if it dramatically affects speech or motor skill, they look for another spot. Source: neurosurgery nurse explained the procedure before.
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