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Related to endoneurium: perineurium
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  • noun

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delicate connective tissue around individual nerve fibers in nerve

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6) Seddon Sunderland Structural and functional processes Neurapraxia 1 Myelin damage, conduction slowing, and blocking Axonotmesis 2 Loss of axonal continuity; endoneurium intact; no conduction Neurotmesis 3 Loss of axonal and endoneurial continuity; perineurium intact; no conduction 4 Loss of axonal, endoneurial, and perineurial continuity; epineurium intact; no conduction 5 Entire nerve trunk separated; no conduction
Histological analysis of the sciatic nerve CG revealed that the nerve fibers were of normal range, with different diameters, and revealed the presence of Schwann cell nuclei at the periphery of the myelin sheath and fibroblast nuclei in the endoneurium.
In Grade 3, axonal degeneration and loss of endoneurium may occur, and nerve fiber continuity recovery may be incomplete.
All nerve biopsies displayed inflammatory cell infiltrate with vacuolated cells, fibrosis of the perineurium, endoneurium and endoneural vessels (Figure 1, Table 3).
Sural nerve biopsies from these patients showed increased inflammation involving the epi- and endoneurium.
Common to all head and neck tumours including skin cancers, nerve sheath spread via the endoneurium, perineurium or perineural lymphatics requires meticulous attention to the paths of the Vth and VIIth nerves and their branches.
Collagen type III, also known as reticular fiber, is involved in forming the scaffolding for the cells of the loose connective tissues related to the endoneurium, vascular walls, and smooth muscle.
Collagen is present within the onion bulbs, and the endoneurium contains an abundant mucinous matrix.
Following the presentation of bacterial or viral epitopes by macrophages, T cells become activated and penetrate the endoneurium, where they engage epitopes on abaxonal Schwann cells, thereby triggering a cytokine cascade [3].
6) More recently, investigators have proposed that malignant cells invade and spread via potential spaces in the connective tissue planes of the perineurium and endoneurium without inciting an inflammatory response in the surrounding stroma or invading the nerve fibers themselves.
facial trochlear optic phrenic axon dendrite occipital hypoglossal frontal mandibular nasociliary ophthalmic tibial laryngeal hillock bouton median splanchnic hypogastric femoral genitofemoral plexus pudendal myelin trigeminal abducens oculomotor vagus glossopharyngeal vestibulocochlear accessory auricular maxillary lacrimal supraorbital ethmoidal peroneal endoneurium synapse ganglion antebrachial acetylcholine ramus iliohypogastric subcostal obturator ilioinguinal oligodendrocyte nerve astrocyte