myelin sheath description
1 answer
The myelin sheath is a protective covering that surrounds nerve fibers, also known as axons, in the central and peripheral nervous systems. It is made up of layers of specialized cells called oligodendrocytes in the central nervous system and Schwann cells in the peripheral nervous system. The myelin sheath serves to insulate and protect the nerve fibers, enhancing the speed and efficiency of nerve signal transmission. It also helps to prevent the loss of electrical impulses as they travel along the nerve fiber. Damage to the myelin sheath can result in decreased nerve function and a variety of neurological symptoms.