The cellular sheet made by the fibroblast-like cells were isolated from the inner cellular layer of the
perineurium by the accumulated subperineurial oedema which could explain the subperineurial accumulation of the endoneurial oedema following nerve injury.
In addition, a delicate resection of the free edges of the ligament can be performed rather than simply dissecting, reducing the risk of
perineurium's intrinsic fibrosis.
Within a smaller field of view it is possible to visualize anatomical details, such as the epineurium, the
perineurium, and single fascicles, which otherwise would require a biopsy to be detected [15,16].
Transverse view showing breach in the
perineurium of thickened nerve with hypoechoic areas suggestive of abscess formation as indicated by arrow.
The schwanoma and neurofibroma differ histologically and histogenetically; the schwannoma is derived from the Schwann cells and the neurofibroma from the fibroblasts of the
perineurium. [1,2] Neurofibroma is unencapsulated consisting of a mixture of Schwann cells, perineurial cells, and endoneurial fibroblasts.
Recent studies in experimental animals have indicated that hyperglycemia stimulates the production of nitric oxide, which reacts with superoxide anion to form peroxynitrite, damaging the endothelium and
perineurium. The increased ROS in the kidney, especially the superoxide radicals, react with NO to form peroxynitrite, which in turn binds to tyrosine and other protein residues, yielding highly cytotoxic compounds such as nitrotyrosine, which is a measure of ONOO- (peroxynitrite) in the renal and other vascular tissues.
The
perineurium was removed from the dorsal surface of the brain to expose the OLs.
Next, the
perineurium of the nerves was removed under magnification and microsurgical technique.
Myenteric plexus neuronal cell bodies were identified by their large size, position between the internal and external layers of smooth muscle of the muscularis externa, encapsulation by a
perineurium, and their morphology.
(3) The individual axons of the nerve are surrounded by the endoneurium and subsequently bound together in fascicles by the
perineurium. The individual fascicles are the smallest units of the nerve that can be manipulated with current surgical techniques.
The large peripheral nerves are composed of Schwann cell-axon complexes, supported and protected by 3 connective-tissue sheaths: endoneurium,
perineurium, and epineurium.