Edgar Cayce often recommended a specific exercise to improve nerve functioning and circulation to the head and neck. Here is a simple description of the "head and neck exercise:"
Take this [exercise] regularly, not taking it sometimes and leaving off sometimes, but each morning and each evening take this exercise regularly for six months and we will see a great deal of difference: Sitting erect, bend the head forward three times, to the back three times, to the right side three times, to the left side three times, and then circle the head each way three times. Don't hurry through with it but take the time to do it. You will get results. (3549-1)