A FIBERS Meaning and
Definition
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A fibers, also known as A-delta fibers or Group III fibers, are a classification of nerve fibers that transmit sensory information in the peripheral nervous system. These fibers are a part of the larger A-fiber group, which includes both A-delta and A-beta fibers.
A fibers are myelinated nerve fibers that have a medium diameter and conduct impulses at a relatively faster speed compared to other fibers. These fibers are primarily involved in the transmission of pain and temperature sensations. They are responsible for the initial sharp, localized pain felt when injured or exposed to a harmful stimulus. A fibers also play a role in the sensation of cold temperature.
In terms of structure, A fibers have a larger axon diameter and are surrounded by myelin, a fatty substance that enhances the conduction speed of the nerve impulses. The myelin sheath acts as an insulator, allowing the signal to travel faster along the fiber. This high conduction velocity is crucial for the transmission of pain and temperature sensations, allowing the brain to react quickly in potentially dangerous situations.
In summary, A fibers are myelinated nerve fibers involved in transmitting sharp pain and temperature sensations. They play a critical role in the body's defense mechanisms, enabling a rapid response to harmful stimuli and environmental changes.
Common Misspellings for A FIBERS
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Etymology of A FIBERS
The term "A fibers" is not a word in itself, but rather a classification used in neuroanatomy and neurophysiology to describe different types of nerve fibers. However, each classification of nerve fibers may have its own etymology.
In the case of the classification of nerve fibers known as "A fibers", the "A" refers to a group of fast-conducting myelinated nerve fibers. These fibers are further divided into subgroups: Aα, Aβ, Aγ, and Aδ fibers.
The "A" classification in this context comes from the work of Erlanger and Gasser, who first categorized nerve fibers in the 1920s. They used the letters A, B, and C to designate different groups of fibers based on their conduction velocity. A fibers were found to be the fastest-conducting fibers, followed by B and C fibers.
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