Ponca City, We love you writes "Legendary bluegrass musician Eddie Adcock has undergone brain surgery to treat a hand tremor, playing his banjo throughout to test the success of the procedure. Adcock suffers from essential tremor, a condition where there is a continuing deterioration in areas of the brain that control movement, causing a tremor that usually appears when the person tries to act or move. Deep brain stimulation can be used to treat the movement difficulties of both Parkinson's and essential tremor by sinking an electrode into the thalamus, a deep brain area that is part of the motor loop — a circuit that helps coordinate movement. Surgeons placed electrodes in Adcock's brain and fitted a pacemaker in his chest, which delivers a small current that shuts down the region of his brain causing the tremors. The most sensible thing to do was to tweak the system while Adcock was playing the banjo to optimize the effect for the thing that's most important to him."