unmyelinated

American  

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

adjective

Anatomy.

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

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Etymology

Origin of unmyelinated

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

Example Sentences

These unmyelinated spaces are about one micrometer long and contain voltage gated Na+ and K+ channels.

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

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

Propagation, as described above, applies to 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