- A cell that enfolds one or more axons of the peripheral nervous system; in myelinated fibers its plasma membrane forms the lamellae of myelin. SYN: neurolemma, sheath of Schwann. [neuri + G. lemma, husk]
* * *neu·ri·lem·ma .n(y)u̇r-ə-'lem-ə n the plasma membrane surrounding a Schwann cell of a myelinated nerve fiber and separating layers of myelinneu·ri·lem·mal -'lem-əl adj
* * *n.the sheath of the axon of a nerve fibre. The neurilemma of a medullated fibre contains myelin laid down by Schwann cells.• neurilemmal adj.
* * *neu·ri·lem·ma (noor″ĭ-lemґə) [neur- + -lemma] the thin membrane spirally enwrapping the myelin layers of certain fibers, especially of peripheral nerves, or the axons of certain unmyelinated nerve fibers. Called also neurolemma, Schwann membrane, sheath of Schwann, and endoneural membrane. neurilemmal adj
Neurilemma enclosing axon in a peripheral nerve fiber.
Medical dictionary. 2011.