Medullated Nerve Fiber, Myelinated Nerve Fiber

Medullated Nerve Fibre, Myelinated Nerve Fiber - a nerve fiber that has a myelin sheath that surrounds and insulates the axon passing inside it.

The myelin sheath is formed by Schwann cells and consists of many layers of lipids and proteins. It allows the fast and efficient transmission of nerve impulses along the axon. The thicker the myelin sheath, the faster impulses are transmitted.

Myelinated nerve fibers conduct impulses at a speed of 5-120 m/s, in contrast to unmyelinated nerve fibers, where the speed is 0.5-2 m/s. Myelination allows the body to quickly respond to external stimuli and coordinate movements.

A nerve fiber (myelinated nerve fiber) is a nerve fiber that has a myelin sheath that surrounds and insulates the axon passing within it.

The myelin sheath is formed by special cells - oligodendrocytes in the central nervous system and Schwann cells in the peripheral nervous system. It consists of many layers of lipids and proteins that form an insulating and protective structure around the axon.

The presence of the myelin sheath allows nerve impulses to travel much faster along the fiber compared to unmyelinated fibers. This occurs due to the so-called saltatory (jumping) conduction - impulses jump from one area of ​​the myelinated membrane to another.

Thus, myelinated nerve fibers are critical for the rapid and efficient transmission of nerve signals in the body. Disturbances in the myelination process can cause serious neurological diseases.

Nerve fibers Myelin and Peripheral nerves.

Nerve fiber is the main element of nervous tissue that is capable of conducting nerve impulses. It consists of **one or more concentric protein strands** (i.e. fibers) covered by an outer membrane called the myelin sheath. There are two main types of nerve fibers: myelinated and unmyelinated fibers.

- Myelin sheath If the fiber is thick enough (usually more than 3 microns in diameter), then it necessarily has a myelin sheath. It is composed of complex molecules of lipids (fats), proteins and fats and covers the entire internal diameter of the fiber. When a pulse travels along a fiber, it mechanically affects the cladding; this causes it to expand on one side and contract on the other side