onvermyeliniseerde
Onvermyeliniseerde refers to nerve fibers that lack a myelin sheath. Myelin is a fatty insulating layer that surrounds the axons of many neurons, acting similarly to the insulation on an electrical wire. This sheath is produced by glial cells, specifically oligodendrocytes in the central nervous system and Schwann cells in the peripheral nervous system. The presence of myelin is crucial for rapid transmission of nerve impulses through a process called saltatory conduction, where the impulse "jumps" between gaps in the myelin called nodes of Ranvier.
Nerve fibers that are onvermyeliniseerde, therefore, conduct nerve impulses much more slowly than myelinated fibers. These