On the molecular level the Myofascial system is organized as organic crystalline. Crystals produce small electrical charge when sustained pressure is applied to them. During a Myofascial Release treatment your therapist would apply pressure into the connective tissue and thereby generate electrical fields.
In all likelihood, this is where the nervous system gets involved. A tight and restricted tissue is not only dehydrated, but also has low electrical potential. The fascia barely moves, and has less strength and power.
The application of Myofascial Release principles increases electrical potential which attracts water molecules, with that rehydrating the ground substance. This phenomenon is often called the motility response of the tissue.
Further, Myofascial Release therapy helps rearrange and organize the collagen fibers of the fascia which leads to a healthier and more movable connective tissue.
*Reference: John F. Barnes article – click here