The delicate outer sheath of a nerve fiber; the primitive sheath.

(or neurolemma neuron = nerve (q.v.) + lemma = husk; delicate layer extenal to myelin sheath of a Schwann cell around nerve fibre.

Membrane covering the nerve fiber; also called Schwannï3/4's membrane.

thin membranous sheath around a nerve fiber

The thin connective sheath which surrounds the nerve fibers outside of the central nervous system. It surrounds both sympathetic and cerebro-spinal nerve fibers, and at the roots of the nerves is continuous with the pia mater.

The delicate membranous covering of a nerve fiber. Also called sheath of Schwann.