Why do nerve impulses conduct more rapidly in myelinated nerves?

In case of myelinated fibre, there are more than 100 layers of plasma membrane which increases the insulation. Hence, the nerve impulses are conducted faster.

What causes faster nerve impulses?

Myelin serves as a kind of electrical insulator that makes nerve impulses travel fast, so as to maintain high-speed communication between nerve cells, across the peripheral and central nervous systems (brain and spinal cord).

In which type of nerve Fibres the nerve impulse will move faster?

Medullated nerve fibres are covered by myelin sheath. The conduction of impulse is faster in medullated nerve fibre due to the presence of myelin sheath and nodes of Ranvier.

What is the speed of nerve impulses?

Nerve impulses are extremely slow compared to the speed of electricity, where the electric field can propagate with a speed on the order of 50–99\% of the speed of light; however, it is very fast compared to the speed of blood flow, with some myelinated neurons conducting at speeds up to 120 m/s (432 km/h or 275 mph).

Does not affect the speed of conduction of nerve impulse?

The speed of nerve impulse conduction is not determined by temperature.

How does a myelinated nerve Fibre differ from a non-myelinated nerve fiber?

Myelinated fibres possess notes of Ranvier. Unmyelinated nerve fibres do not possess the Notes of Ranvier. Myelinated nerve fibres occur in the white matter of the brain, spinal cord and in the central and cranial nervous system. Unmyelinated nerve fibres occur in the autonomic nervous system.

What are myelinated nerve fibres?

Myelinated retinal nerve fiber layers (MRNF) are retinal nerve fibers anterior to the lamina cribrosa that, unlike normal retinal nerve fibers, have a myelin sheath. Clinically, they appear to be gray-white well-demarcated patches with frayed borders on the anterior surface of the neurosensory retina.