Complex sentence: Sutherland was the first to claim to feel a rhythmic shape change in the bones of the cranium, he later applied this movement to all body tissues and this movement is the agent of change in dysfunctional tissues.
Split into simpler sentences: Sutherland was the first to claim to feel a rhythmic shape change in the bones of the cranium. He later applied this movement to all body tissues and this movement is the agent of change in dysfunctional tissues.