the brain feels no pain

The only part of the head that feels physical pain is skin.

Image source here.

Bluegrass Badass

A musician who underwent brain surgery to treat a hand tremor played his banjo throughout to test the success of the procedure. Eddie Adcock [born 1938] is one of the pillars of Bluegrass Music and realised his tremor could threaten his ability to perform professionally. Surgeons placed electrodes in Mr Adcock's brain and fitted a pace maker in his chest which delivers a small current which shuts down the region of his brain causing the tremors. A surgeon filmed the operation at the Vanderbilt Medical Center in Nashville, Tennessee.

badass: A person whose extreme attitudes and behavior are admirable.