This short video gives a nice explanation of how Feldenkrais works. Brian Guenther is a Golf Professional on the PGA who was having chronic neck and back pain. He sought out a Feldenkrais practitioner and together they were able to relieve the pain. The key was teaching Brian how to use his whole body and for him to see, feel, and sense the connections between his neck, back, pelvis, and spine.
What I particularly like about this video, is that it shows the Feldenkrais practitioner working with Brian. Check it out: