Demonstrated in the video below is how, with the right feedback, the patient can learn to move their nerve in less than a minute.   Initially, it is somewhat chaotic but, as time passes and the subject learns, the nerve movement becomes more and more precise.

LEFT: the nerve is the band going across the top third of the screen.  Note that the nerve has two main fascicles with what seems like a septum (interfascicular epineurium) dividing them in the middle.