Myelin is the layer that forms around nerve cells. Its purpose is to speed the transmission of impulses along nerve cells.
Review Date 1/19/2018
Updated by: Joseph V. Campellone, MD, Department of Neurology, Cooper Medical School at Rowan University, Camden, NJ. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.