Myeliinivöidyille
Myeliinivöidyille is a Finnish term that translates to "myelinated axons" in English. It refers to nerve fibers that are covered by a fatty insulating sheath called myelin. This myelin sheath is produced by glial cells, specifically Schwann cells in the peripheral nervous system and oligodendrocytes in the central nervous system. The myelin sheath is not continuous but is interrupted at regular intervals by gaps called nodes of Ranvier.
The presence of myelin significantly increases the speed at which nerve impulses (action potentials) can travel
Damage to the myelin sheath, a condition known as demyelination, can severely impair nerve function. Diseases