Which cells are Unmyelinated

The supportive cell of the brain includes the glial cell.Myelinated neurons are neurons whose axons are surrounded by myelin;Which neuroglial cell type forms the myelin sheath in the peripheral nervous system?These axons are usually thinner, less than one micron in diameter.Myelin is a layer of a fatty insulating substance, which is formed by two types of glial cells :The main difference between these two types of neurons is the speed of conduction of impulse.

The structure of schwann cells in unmyelinated fibres.Nerve impulses generated at the nociceptive receptor system are delivered into the spinal cord by small myelinated and unmyelinated nerve fibres (5 µ m or less in diameter), that mainly belong to the ad and c groups of afferent nerve fibres ( fig.Neuroglial cell unmyelinated nerve fiber myelinated nerve fibers nodes of ranvier.Astrocyte satellite cell oligodendrocyte schwann cell.Nodal spaces (nodes of ranvier) are unmyelinated spaces ∼2 μm long.Mostly, one axon is present in one nerve cell.

In unmyelinated nerves, schwann cells can associate with several axons;Unmyelinated of a nerve fibre, lacking a myelin sheath.On the other hand, unmyelinated axons have lesser regenerative potential, even with intact schwann cell tubes, such as nerve crush.