The thin membranous covering which surrounds every nerve-?bre. (See NERVE.)
(neurolemma) 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.
n. a nerve fibre: a single process extending from the cell body of a *neuron and carrying nerve impulses away from it. An axon may be over a metre in length in certain neurons. In large nerves the axon has a sheath (neurilemma) made of *myelin; this is interrupted at intervals by gaps called nodes of Ranvier, at which branches of the axon leave. An axon ends by dividing into several branches called telodendria, which make contact with other nerves or with muscle or gland membranes.... axon
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