perineuriumn.

1842 R. Dunglison Med. Lexicon (ed. 3) Perineurion, neurilemma.]

1867 Quain's Elements Anat. (ed. 7) I. p. cxliv Some recent writers, believing that the primitive sheath or membranous tube of the nerve-fibre corresponds to the sarcolemma of muscle, have proposed to designate it as the neurilemma, and to use the term perineurium, for the coarser sheathing of the nerve and nervous cords.

1874 A. E. J. Barker tr. H. Frey Histol. & Histochem. of Man 317 The nerves of the brain and spinal cord..become clothed with a delicate envelope at their exit from the nervous centres. This covering receives another addition from the dura mater of connective-tissue bundles in its passage through the latter, and..constitutes what was formerly known as ‘neurilemma’, but which we will designate from henceforth ‘perineurium’.

1899 T. C. Allbutt et al. Syst. Med. VI. 637 The thickened perineurium and interstitial tissue.

1931 Q. Rev. Biol. 6 65/1 Fine divisions of the connective tissue framework of the nerve trunk which pass in from the perineurium and form capsules about individual nerve fibers.

1968 New Eng. Jrnl. Med. 11 Jan. 86 (caption) The perineurium contains fibroblasts, and lymphatic channels lie outside the perineurium.

1990 Brain 113 499 The crush disrupted the endoneurial nerve fibre sheaths while preserving the continuity of the epineurium and perineurium..at the site of the crush.