endoneurium


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Related to endoneurium: perineurium

endoneurium

 [en″do-noor´e-um]
the interstitial connective tissue in a peripheral nerve, separating individual nerve fibers. Called also Henle's sheath and connective tissue sheath of Key and Retzius. adj., adj endoneu´rial.

en·do·neu·ri·um

(en'dō-nū'rē-ŭm), [TA]
The innermost connective tissue supportive structure of nerve trunks, surrounding individual myelinated and unmyelinated nerve fibers; consists principally of ground substance, collagen, and fibroblasts; with the perineurium and epineurium, composes the peripheral nerve stroma.
[endo- + G. neuron, nerve]

en·do·neu·ri·um

(en'dō-nūr'ē-ŭm) [TA]
The innermost connective tissue supportive structure present in peripheral nerve trunks, found within the fascicles. With the perineurium and epineurium, the endoneurium comprises the peripheral nerve stroma.
Synonym(s): Henle sheath.
[endo- + G. neuron, nerve]

endoneurium

The CONNECTIVE TISSUE surrounding individual nerve fibres.

Henle,

Friedrich Gustar Jacob, German anatomist, pathologist, and histologist, 1809-1885.
crypts of Henle - infoldings of conjunctiva.
Hassall-Henle bodies - see under Hassall
Henle ampulla - the dilation of the ductus deferens where it approaches its contralateral partner before it is joined by the duct of the seminal vesicle. Synonym(s): ampulla of ductus deferens
Henle ansa - Synonym(s): nephronic loop
Henle fenestrated elastic membrane - Synonym(s): elastic laminae of arteries
Henle fiber layer - the layer of inner cone fibers in the central area of the retina.
Henle fissures - minute spaces filled with connective tissue between the muscular fasciculi of the heart.
Henle glands - accessory lacrimal glands. Synonym(s): Baumgarten glands
Henle layer - the outer layer cells of the inner root sheath of the hair follicle.
Henle ligament
Henle loop - Synonym(s): nephronic loop
Henle membrane - the transparent inner layer of the choroid in contact with the pigmented layer of the retina. Synonym(s): lamina basalis choroideae
Henle nervous layer - the layer of the retina from the outer plexiform to the nerve fiber layer inclusive. Synonym(s): entoretina
Henle reaction - dark brown staining of the medullary cells of the adrenal bodies when treated with the salts of chromium, the cortical cells remaining unstained.
Henle sheath - the delicate connective tissue enveloping individual nerve fibers within a peripheral nerve. Synonym(s): endoneurium
Henle sphincter
Henle spine - small bony prominence anterior to the supramastoid pit at the posterosuperior margin of the bony external acoustic meatus. Synonym(s): suprameatal spine
Henle tubules - the straight portions of the uriniferous tubules that form Henle loop, distinguished as the descending and ascending tubules of Henle.
Henle warts - Synonym(s): Hassall-Henle bodies

Key,

Ernst A.H., Swedish anatomist and physician, 1832-1901.
foramen of Key-Retzius - one of the two lateral openings of the fourth ventricle into the subarachnoid space at the cerebellopontine angle. Synonym(s): lateral aperture of the fourth ventricle
Key-Retzius corpuscles - tactile corpuscles, resembling pacinian corpuscles, found in the beak of certain aquatic birds.
sheath of Key and Retzius - the delicate connective tissue enveloping individual nerve fibers within a peripheral nerve. Synonym(s): endoneurium
References in periodicals archive ?
However, the most obvious changes caused by axonal degeneration were observed after four days of injury and consisted of axonal swelling and disorganization of endoneurium, myelin degradation, and intense presence of phagocytic cells.
Furthermore, the endoneurium of perineurioma lacks an abundant mucinous matrix.
One week after the crush injury, the endoneurium showed a significant increase of the number of endoneurial fibroblasts and fibroblasts-like cells with long cytoplasmic processes.
Within the left ischiadic nerve, increased numbers of lymphocytes and plasma cells were present in the endoneurium, in addition to axonal swelling and myelin degeneration (Fig 5).
The endoneurium showed areas of necrosis with granulomas comprising of epithelioid cells, Langhans giant cells, lymphocytes and areas of edema and increased vascularity.
(2,3) Normal perineurial cells constitute the perineurium, a protective barrier situated between the epineurium and endoneurium layers of the nerves that surround both myelinated and unmyelinated axon-Schwann cell complexes of peripheral nerve fascicles.
Invasion of the endoneurium may follow, and the whole endoneurial zone may appear to be occupied by epitheloid cells with or without the presence of bacilli.
Each fiber or group of fibers is enveloped by endoneurium, a loose collagenous matrix that protects and nourishes each axon.
The endoneurium, a loose connective tissue, is the fourth layer surrounding the neurites.
The percentages of incidents points over axon, endoneurium and myelin sheath of the tibial and fibular nerves from each group were analyzed, the results are presented in (Tables I and II), and the muscle mass of the cranial tibial muscle in Figure 5.
Thus, the intensity of nerve injury depends directly upon the degree of impairment in the functional unit of the nerve, the nerve itself, and the framework of connective fiber, which includes the: epineurium, perineurium and endoneurium (Lee & Wolfe, 2000; Yegiyants et al.).