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unmyelinated

American  
[uhn-mahy-uh-luh-nay-tid] / ʌnˈmaɪ ə ləˌneɪ tɪd /

adjective

Anatomy.
  1. pertaining to nerve fibers that are not covered with a myelin sheath.


Etymology

Origin of unmyelinated

First recorded in 1915–20; un- 1 + myelinated


Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

The Schwann cells are separated by gaps of unmyelinated fibers called nodes of Ranvier over which the nerve impulse travels as the signal passes along the neuron, increasing the speed of transmission.

From Textbooks ● Jun. 9, 2022

The signal moves faster than in unmyelinated axons and is insulated from signals in other nerves, limiting cross talk.

From Textbooks ● Aug. 12, 2015

Propagation, as described above, applies to unmyelinated axons.

From Textbooks ● Jun. 19, 2013

This neuron then projects to a target effector—in this case, the trachea—via gray rami communicantes, which are unmyelinated axons.

From Textbooks ● Jun. 19, 2013

Myelin is often likened to the plastic coating around electrical wires—it insulates the neural circuits, making them about a hundred times faster than unmyelinated circuits.

From "The 57 Bus" by Dashka Slater

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