Biology dictionary

Definition

noun

A neuron in which the axon is enveloped by a layer of Schwann cell membranes ([myelin sheath]]).

Supplement

The myelin sheath that envelopes the nerve cell is crucial for faster conduction of action potential. This type of neuron is found in the peripheral nervous system (especially the sensory and motor neurons) and the white matter of central nervous system

Synonyms:

• medullated nerve
• myelinated nerve

Compare:

• non-myelinated nerve
• dyemyelinated nerve

Related term:

• myelinated nerve fiber

Mentioned in:

• action potential