Type: Term Pronunciation: rahsh′kof Definitions: 1. a plexus of myelinated nerve fibers located between the core of the pulp of the tooth and the cell-rich zone; axons of Raschkow plexus lose their myeline sheath (but not their Schwann cells) as they penetrate the cell-rich and cell-free zones to make synaptic contact with the odontoblast cel...