Which primary afferent axons are myelinated?

Last Update: April 20, 2022

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Asked by: Halle Langosh DDS
Score: 4.8/5 (36 votes)

These primary afferent axons come in different diameters and can be divided into different groups based on their size. Here, in order of decreasing size, are the different nerve fiber groups: A-alpha, A-beta, A-delta and C-nerve fibers. A-alpha, A-beta and A-delta nerve fibers are insulated with myelin.

Are afferent neurons myelinated?

Afferent nerves in the lower urinary tract are divided into two types: A-δ and C-fibers. A-δ fibers are larger in diameter (2 to 5 μm), myelinated, with higher conduction velocities (2 to 30 m/sec) and have a lower threshold of activation than the C-fibers (Sengupta and Gebhart, 1994).

What afferent fibers are myelinated?

Group A nerve fibers are one of the three classes of nerve fiber as generally classified by Erlanger and Gasser. The other two classes are the group B nerve fibers, and the group C nerve fibers. Group A are heavily myelinated, group B are moderately myelinated, and group C are unmyelinated.

Which axons is thinly myelinated?

The Aδ fibers are a group of faster conducting PANs, slightly larger than the small-caliber C fibers, and have a thin covering of myelin to speed conduction velocity.

What type of neurons are Unmyelinated?

Unmyelinated Axons are present in the autonomic nervous system. Both the parasympathetic nervous system and sympathetic nervous system are a part of autonomic nervous system. These systems are formed by motor neurons whose axons are unmyelinated.

Difference between myelinated and non myelinated axons

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