1 Many, a majority of companies in this research do take a strategic approach to digital. 2  From talking to companies, I find the creation of digital plans often occurs in two stages.First a separate digital marketing plan is created.
medullary sheath myelin sheath. myelin sheath (nerve sheath) the sheath surrounding the axon of myelinated nerve cells, consisting of concentric layers of myelin formed in the peripheral nervous system by the plasma membrane of Schwann cells, and in the central nervous system by the plasma membrane of oligodendrocytes.
A disease that effects the myelin sheath is multipâ¦le sclerosis (MS). The function of the myelin sheath is to act as an insulator for the nerve cell. It's kind of like the rubber casing found on the outside of wires to protect the electron movement inside and allow us not to get shocked.