A motorized seat belt retractor having a load limiter to control the tensile load on a seat belt webbing, especially when the webbing is withdrawn due to an emergency condition. The latter compounds may be added to the process stream before or after the slimicide is added or combined with the slimicide and added directly thereto. At least one of the blocks has a through-penetrating channel for receiving the line, wherein the block is adapted to permit lateral insertion of the line into the channel. An anchor portion remains fixed to the substrate. Disorders treated andor prevented include Parkinson’s Disease.