1) Medullated 
nerves axons which are completely wrapped in a sheath of myelin by schwann cells. One cell wraps about a millimetre of nerve axon. Myelinated nerve axons carry impulses faster then unmeyelinated nerves as the impulse jumps across the myelin sheath of each adjacent Schwann cell to that of the next
Having a myelin sheath. ... Synonym: medullated. ... (05 Mar 2000) ... 
(mi´ә-lĭ-nāt″әd) having a myelin sheath.
Type: Term Pronunciation: mī′ĕ-li-nāt′ed Definitions: 1. Having a myelin sheath. Synonyms: medullated2
[adj] - (of neurons) covered with a layer of myelin
myelinated Having a myelin sheath; such as, a nerve fiber.
medullated adjective (of neurons) covered with a layer of myelin
(of a nerve) having a myelin sheath; medullated.