Circle of zinn-haller
WebDec 1, 1998 · Zinn–Haller circle; blood flow; optic nerve head; myopia; Since Zinn1 and Haller2 first reported the existence of the arterial circle (Zinn–Haller arterial ring) situated in human sclera around the optic nerve head in 1755, it has been debated whether the ring actually exists. Although many researchers have paid much attention to its existence, … WebCircle of Zinn Haller. It is an anastomotic ring formed by the branches of short posterior ciliary arteries anastomosing with each other around the optic disc. Branches pass to the …
Circle of zinn-haller
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Webthe ophthalmic artery. The anastomotic interlace of ciliary vessels in the circle of Zinn-Haller can be found in the posterior sclera. These vessels supply the laminar region with blood through branches that surround the optic nerve. Vascular structures make up the majority of the choroid, a significant uveal component in the eye. Webvascular circle of optic nerve "秦" in English: Qin,a state in the Zhou Dyna ... "氏" in English: family name; surname "环" in English: ring; hoop "视神经" in English: optic nerve; nervus opticus "血管" in English: blood vessel; vascellum; ves ... "秦氏环, 视神经血管环" in English: circulus zinnii "视神经血管环" in English: circle of haller; circle of zinn; circ ...
The common tendinous ring, also known as the annulus of Zinn, or annular tendon, is a ring of fibrous tissue surrounding the optic nerve at its entrance at the apex of the orbit. It is the common origin of the four recti muscles of the group of extraocular muscles. It can be used to divide the regions of the superior orbital fissure. Some branches of the short posterior ciliary arteries supply the optic disc by means of an anastomotic ring - the circle of Zinn-Haller or circle of Zinn - which is associated with the fibrous extension of the ocular tendons (common tendinous ring (also annulus of Zinn)). See more The short posterior ciliary arteries are a number of branches of the ophthalmic artery. They pass forward with the optic nerve to reach the eyeball, piercing the sclera around the entry of the optic nerve into the eyeball. See more The number of short posterior ciliary arteries varies between individuals; one or more short posterior ciliary arteries initially branch off the ophthalmic artery, subsequently dividing to form up to 20 short posterior ciliary arteries. Origin See more • The terminal portion of the optic nerve and its entrance into the eyeball, in horizontal section See more • Long posterior ciliary arteries • Anterior ciliary arteries See more
Webcircle of Zinn. Anastomosing circle of short ciliary arteries which have pierced the sclera about the optic nerve. Branches pass forward to the choroid, inward to the optic nerve … WebBlood supply to the lamina cribrosa arises from short posterior ciliary arteries or by the circle of Zinn-Haller, in the sub-scleral space, when it exists. Anastomoses form the Zinn-Haller circle [37] [38] from choroidal, pial, and perineural arteries and 4-8 posterior ciliary arteries.
WebThe temporal part of the circle of Zinn-Haller can be revealed by fundus fluorescein angiography particularly in pathological eyes with prominent peripapillary atrophy and a …
WebThe arterial circle of Zinn-Haller supplies the optic nerve head, which is made up of anastomoses from branches of short posterior ciliary arteries (from posterior ciliary artery, PCA), the adjacent pial network, and choroidal vessels. Hypoperfusion of the PCA is the likely cause for non-arteritic anterior ischemic optic neuropathy. smarch carroWebThe circle of Zinn-Haller is a non-continuous arterial circle surrounding the ONH within the perineural sclera. Formed by a network of small branches of the short PCAs, the circle of … smarch meaningWebThe peripapillary arterial circle of Zinn–Haller is located at the peripheral end of the scleral flange and nourishes the lamina cribrosa [132,133]. In eyes with a delta zone, the distance between arterial circle and the lamina cribrosa is enlarged as a result of the elongation of the peripapillary scleral flange. smarch incWebMar 17, 2024 · The circle of Zinn–Haller (CZH) is known to be an intrascleral arteriolar anastomosis derived from medial and lateral paraoptic short posterior ciliary arteries (SPCAs). The significance of this arterial circle in supplying the anterior optic nerve and peripapillary region has been the subject of controversy. smarch chiropractic in jackson miWebNov 1, 2013 · Since the ZHAC is the main arterial source for the lamina cribrosa blood supply, the finding may be of interest for the pathogenesis of the increased glaucoma … smarch urbanismsmarch medicalWebArticles from The British Journal of Ophthalmology are provided here courtesy of BMJ Group smarch tccc