Ultrasonography, Doppler, Color
Ultrasonography applying the Doppler effect, with the superposition of flow information as colors on a gray scale in a real-time image. This type of ultrasonography is well-suited to identifying the location of high-velocity flow (such as in a stenosis) or of mapping the extent of flow in a certain region.
A tissue preparation technique that involves the injecting of plastic (acrylates) into blood vessels or other hollow viscera and treating the tissue with a caustic substance. This results in a negative copy or a solid replica of the enclosed space of the tissue that is ready for viewing under a scanning electron microscope.
An alkaloid found in opium but not closely related to the other opium alkaloids in its structure or pharmacological actions. It is a direct-acting smooth muscle relaxant used in the treatment of impotence and as a vasodilator, especially for cerebral vasodilation. The mechanism of its pharmacological actions is not clear, but it apparently can inhibit phosphodiesterases and it may have direct actions on calcium channels.
The 2nd cranial nerve which conveys visual information from the RETINA to the brain. The nerve carries the axons of the RETINAL GANGLION CELLS which sort at the OPTIC CHIASM and continue via the OPTIC TRACTS to the brain. The largest projection is to the lateral geniculate nuclei; other targets include the SUPERIOR COLLICULI and the SUPRACHIASMATIC NUCLEI. Though known as the second cranial nerve, it is considered part of the CENTRAL NERVOUS SYSTEM.
15-Hydroxy-11 alpha,9 alpha-(epoxymethano)prosta-5,13-dienoic Acid
Blood Flow Velocity
Any of various animals that constitute the family Suidae and comprise stout-bodied, short-legged omnivorous mammals with thick skin, usually covered with coarse bristles, a rather long mobile snout, and small tail. Included are the genera Babyrousa, Phacochoerus (wart hogs), and Sus, the latter containing the domestic pig (see SUS SCROFA).
Coronary Artery Bypass
A free radical gas produced endogenously by a variety of mammalian cells, synthesized from ARGININE by NITRIC OXIDE SYNTHASE. Nitric oxide is one of the ENDOTHELIUM-DEPENDENT RELAXING FACTORS released by the vascular endothelium and mediates VASODILATION. It also inhibits platelet aggregation, induces disaggregation of aggregated platelets, and inhibits platelet adhesion to the vascular endothelium. Nitric oxide activates cytosolic GUANYLATE CYCLASE and thus elevates intracellular levels of CYCLIC GMP.
Carotid Artery, Internal
Analysis of blood flow in the long posterior ciliary artery of the cat. (1/68)PURPOSE: Experiments were undertaken to use a new technique for direct on-line measurement of blood flow in the long posterior ciliary artery (LPCA) in cats and to evaluate possible physiological mechanisms controlling blood flow in the vascular beds perfused by this artery. METHODS: Blood flow in the temporal LPCA was measured on a continuous basis using ultrasonic flowmetry in anesthetized cats. Effects of acute sectioning of the sympathetic nerve and changes in LPCA and cerebral blood flows in response to altered levels of inspired CO2 and O2 were tested in some animals. In others, the presence of vascular autoregulatory mechanisms in response to stepwise elevations of intraocular pressure was studied. RESULTS: Blood flow in the temporal LPCA averaged 0.58+/-0.03 ml/min in 45 cats anesthetized with pentobarbital. Basal LPCA blood flow was not altered by acute sectioning of the sympathetic nerve or by changes in low levels of inspired CO2 and O2, although 10% CO2 caused a modest increase. Stepwise elevations of intraocular pressure resulted in comparable stepwise decreases of LPCA blood flow, with perfusion pressure declining in a linear manner throughout the perfusion-pressure range. CONCLUSIONS: Ultrasonic flowmetry seems to be a useful tool for continuous on-line measurement of LPCA blood flow in the cat eye. Blood flow to vascular beds perfused by this artery does not seem to be under sympathetic neural control and is refractory to modest alterations of blood gas levels of CO2 and O2. Blood vessels perfused by the LPCA show no clear autoregulatory mechanisms. (+info)
Effect of Ox-LDL on endothelium-dependent response in pig ciliary artery: prevention by an ET(A) antagonist. (2/68)PURPOSE: To investigate whether oxidized low-density lipoprotein (Ox-LDL) affects endothelium-dependent responses in isolated porcine ciliary arteries. METHODS: In a myograph system for isometric force measurements, quiescent vessels were incubated with 50 microg/ml, 100 microg/ml, or 200 microg/ml Ox-LDL; 100 microg/ml native LDL (n-LDL); 1 microM of the ET(A)- endothelin receptor antagonist BQ 123; 100 microg/ml Ox-LDL coadministered with 1 microM BQ 123; or 100 microg/ml Ox-LDL coadministered with 50 microM of the protein synthesis inhibitor cycloheximide. Vessels with nonfunctional endothelium (intentionally and mechanically damaged) were also exposed to 100 microg/ml Ox-LDL. Two hours later, vessels were washed, precontracted with the thromboxane A2 analog U 46619 (approximately 0.1 microM), and exposed to bradykinin (0.1 nM to 3 microM), an endothelium-dependent relaxing agent. RESULTS: In quiescent vessels, Ox-LDL evoked delayed contractions. In contrast, no contractions were observed after exposure to n-LDL, BQ 123, Ox-LDL with BQ 123, or Ox-LDL with cycloheximide. In vessels with nonfunctional endothelium, Ox-LDL did not evoke contraction. Bradykinin-induced relaxations were inhibited in a dose-dependent manner by Ox-LDL, but not by n-LDL, BQ 123 alone, Ox-LDL with BQ 123, or Ox-LDL with cycloheximide. CONCLUSIONS: In porcine ciliary arteries, Ox-LDL affects endothelium-dependent responses through the activation of ET(A)- endothelin receptors. As Ox-LDL can accumulate in atherosclerotic plaques, such a mechanism might be involved in the occlusion of the ophthalmic circulation observed in patients with hypercholesterolemia and atherosclerosis. (+info)
Effect of acute intraocular pressure changes on short posterior ciliary artery haemodynamics. (3/68)BACKGROUND/AIMS: Vascular insufficiency due to abnormal autoregulation has been proposed as a major factor in the development of glaucoma. The anterior optic nerve is primarily perfused by the short posterior ciliary arteries. The autoregulatory capacity of these vessels in response to acutely elevated intraocular pressure (IOP) was examined in normal human subjects. METHODS: Colour Doppler imaging was performed on the short posterior ciliary arteries of 10 normal subjects at baseline and during four incremental IOP elevations. Using a scleral suction cup placed temporally, IOP was elevated to approximately 25, 30, 40, and 50 mm Hg. Additional measurements were performed immediately after pressure release. Systolic and diastolic flow velocities were measured and Pourcelot's resistivity index was calculated. RESULTS: Systolic and diastolic flow velocities decreased linearly with each incremental increase in IOP (p < 0.001). Pourcelot's resistivity index increased linearly with each incremental increase in IOP (p < 0.001). Changes in end diastolic velocity, peak systolic velocity, and Pourcelot's resistivity index were linearly related to changes in IOP. CONCLUSION: The normal healthy eye is not able to autoregulate to maintain PCA blood flow velocities in response to acute large elevations in IOP. (+info)
Morphological variations of the peripapillary circle of Zinn-Haller by flat section. (4/68)AIMS: To evaluate the morphometric and morphological variations of the circle of Zinn-Haller (CZH) in the human eye. METHODS: 42 human enucleated eyes were used in this study. After transverse flat thick sections were cut through the optic nerve and adjacent sclera, tissue sections were stained with haematoxylin and eosin or examined immediately by wet preparation under a light microscope. The average vessel diameter of the arterial circle and the average distance between the optic nerve head (ONH) and the arterial circle were determined. Various branching patterns of the CZH were also evaluated. RESULTS: The vessel diameter of the arterial circle was 123 (SD 75) microm (range 20-230 microm). The distance of the CZH from the ONH margin was 403 (352) microm (0-1050 microm). The CZH gave off branches to the optic nerve and to the peripapillary choroid (PPC) with various branching patterns especially at the entry point of paraoptic short posterior ciliary artery. CONCLUSIONS: The CZH exists within a variable distance from the ONH and its average diameter is similar to that of the central retinal vessels though it shows marked variation even in the same circle. The CZH also shows variable configurations in branching patterns. These variations may act as contributing factors that are responsible for the individual susceptibility of the anterior optic nerve and the PPC to circulatory disturbances. (+info)
Microvasculature of the rat optic nerve head. (5/68)PURPOSE: To describe the arterial blood supply, capillary bed, and venous drainage of the rat optic nerve head. METHODS: Ocular microvascular castings from 6 Wistar rats were prepared by injection of epoxy resin through the common carotid arteries. After polymerization, tissues were digested with 6 M KOH, and the castings washed, dried, and coated for scanning electron microscopy. RESULTS: Immediately posterior to the globe, the ophthalmic artery trifurcates into the central retinal artery and two posterior ciliary arteries. The central retinal artery directly provides capillaries to the nerve fiber layer and only contributes to capillary beds in the neck of the nerve head. The remainder is supplied by branches of the posterior ciliary arteries that are analogous to the primate circle of Zinn-Haller. Arterioles arising from these branches supply the capillaries of the transitional, or laminar, region of the optic nerve head. These capillaries are continuous with those of the neck and retrobulbar optic nerve head. All optic nerve head capillaries drain into the central retinal vein and veins of the optic nerve sheath. A flat choroidal sinus communicates with the central retinal vein, the choriocapillaris, and with large veins of the optic nerve sheath. CONCLUSIONS: The microvasculature of the rat optic nerve head bears several similarities to that of the primate, with a centripetal blood supply from posterior ciliary arteries and drainage into the central retinal and optic nerve sheath veins. Association of nerve sheath veins with the choroid represents an important difference from the primate. (+info)
Neurogenic vasoconstriction as affected by cholinergic and nitroxidergic nerves in dog ciliary and ophthalmic arteries. (6/68)PURPOSE: To determine the involvement of noradrenergic and other vasoconstrictor nerves in the contraction of ocular arteries and the modification by cholinergic and nitroxidergic nerves of vasoconstrictor nerve function. METHODS: Changes in isometric tension were recorded in helical strips of the canine posterior ciliary and external ophthalmic arteries denuded of the endothelium, which were stimulated by transmurally applied electrical pulses (5 Hz). Vasoconstrictor mediators were analyzed by pharmacological antagonists, such as prazosin, alpha,beta-methylene ATP, a P2alpha-purinoceptor antagonist, and BIBP3226, a neuropeptide Y receptor antagonist. RESULTS: Transmural electrical stimulation produced contractions that were potentiated by N(G)-nitro-L-arginine (L-NA), a nitric oxide (NO) synthase inhibitor. The contraction was partially inhibited by prazosin and abolished by combined treatment with alpha,beta-methylene ATP but was not influenced by BIBP3226. Stimulation-induced contraction was attenuated by physostigmine and potentiated by atropine. Contractions induced by exogenous ATP were reversed to relaxations by alpha,beta-methylene ATP. In the strips treated with L-NA, prazosin, and alpha,beta-methylene ATP, the addition of L-arginine elicited relaxations by nerve stimulation. The ATP-induced relaxation was attenuated by aminophylline, whereas neurogenic relaxation was unaffected. CONCLUSIONS: Ciliary and ophthalmic arterial contractions by nerve stimulation are mediated by norepinephrine and ATP, which stimulate alpha1-adrenoceptor and P2X purinoceptor, respectively. ATP from the nerve is unlikely involved in vasodilatation. Acetylcholine derived from the nerve impairs the neurogenic contraction, possibly by interfering with the release of vasoconstrictor transmitters, and neurogenic NO also inhibits the contraction postjunctionally by physiological antagonism. (+info)
Specialised sympathetic neuroeffector associations in immature rat iris arterioles. (7/68)Sympathetic nerve-mediated vasoconstriction in iris arterioles of mature rats occurs via the activation of alpha(1B)-adrenoceptors alone, while in immature rat iris arterioles, vasoconstriction occurs via activation of both alpha1- and alpha2-adrenoceptors. In mature rats the vast majority of sympathetic varicosities form close neuroeffector junctions. Serial section electron microscopy of 14 d iris arterioles has been used to determine whether restriction in physiological receptor types with age may result from the establishment of these close neuroeffector junctions. Ninety varicosities which lay within 4 microm of arteriolar smooth muscle were followed for their entire length. Varicosities rarely contained dense cored vesicles even after treatment with 5-hydroxydopamine. 47 % of varicosities formed close associations with muscle cells and 88 % formed close associations with muscle cells or melanocytes. Varicosities in bundles were as likely as single varicosities to form close associations with vascular smooth muscle cells, although the distribution of synaptic vesicles in single varicosities did not show the asymmetric accumulation towards the smooth muscle cells seen in the varicosities in bundles which were frequently clustered together. We conclude that restriction of physiological receptor types during development does not appear to correlate with the establishment of close neuroeffector junctions, although changes in presynaptic structures may contribute to the refinement of postsynaptic responses. (+info)
Optic nerve and peripapillary choroidal microvasculature of the rat eye. (8/68)PURPOSE: To investigate the three-dimensional microvascular anatomy of the optic nerve and peripapillary choroid in the rat eye. METHODS: Gross vascular anatomy of the posterior eye segment of Wistar rats was studied in serial microsections with a light microscope. The optic nerve and peripapillary choroidal vessels were sequentially microdissected, using methylmethacrylate corrosion microvascular castings, and were examined with a scanning electron microscope to determine the three-dimensional relationships of the vessels. RESULTS: The posterior ciliary artery traveled along the inferior side of the optic nerve sheath, directly entered the optic nerve head, and divided into three branches: the central retinal artery and medial and lateral long posterior ciliary arteries, which provided several short branches to the choroid. The optic nerve head vasculature was consistently nourished by a recurrent arteriole from the central retinal artery and an arteriole from the choroidal artery at the peripapillary choroid. The central retinal vein flowed into a venous anastomosis along the optic disc border of the peripapillary choroid. Capillaries within the optic nerve drained into the central retinal vein, the marginal venous anastomosis of the peripapillary choroid, and the pial veins, all of which flowed into the posterior ciliary veins along the optic nerve sheath. CONCLUSIONS: The findings illustrate vascular anatomic differences in optic nerve and peripapillary choroidal microcirculation between rat and human. In rats, the peripapillary choroid plays a significant role in both blood supply and venous drainage of the optic nerve head. The central retinal artery also contributes to the optic nerve head circulation. (+info)
Cilioretinal Artery and Visual Acuity in the Elderly | IOVS | ARVO Journals
Purpose: : To evaluate the influence of a cilioretinal artery on the visual acuity in elderly individuals. Methods: : A representative and randomly selected sample of persons from the Østerbro population was included: 827 individuals aged 60-80 years were assessed for a cilioretinal artery using colour fundus photographs. Visual acuity in eyes of individuals with an identified unilateral cilioretinal artery was compared to the contralateral eye and subsequently stratified and analyzed concerning age and macular pathology. Results: : 209 (25.3%) individuals had a unilateral cilioretinal artery, 54 (6.5%) had bilateral cilioretinal arteries. The fraction of eyes with the cilioretinal artery was not influenced by age or sex. Age stratification revealed that the younger and older individuals (60-66 and 74-80 years, respectively) had the same visual acuity in eyes with and without a cilioretinal artery. Individuals aged 67-73 years had a significantly reduced visual acuity in eyes with a ...
Short posterior ciliary arteries (Arteriae ciliares posteriores breves) | Kenhub
Short posterior ciliary arteries aka Arteriae ciliares posteriores breves in the latin terminology and part of arteries and veins of the eye. Learn more now!
Cilioretinal Artery Occlusion Combined with Central Retinal Vein Occlusion: What Is the Best Imaging Modality for the Follow-Up?
We report retinal structural changes of a 37-year-old man diagnosed with the concomitant occlusion of cilioretinal artery and central retinal vein. Comprehensive ophthalmological evaluation was performed, followed by spectral-domain optical coherence tomography (SD-OCT, Heidelberg), optical coherence tomography angiography (OCT angiography, Optovue Inc., Fremont, California, USA), fluorescein angiography, and color fundus photography. The use of OCT angiography and en face SD-OCT imaging as an adjunct test to map out correlative paracentral scotomas during follow-up allowed us to evaluate cilioretinal artery occlusion in the best way due to obtaining satisfactory images of the normal retinal vascular networks and areas of nonperfusion and congestion at various retinal levels.
Decreased Retrobulbar Blood Flow as a Predictor for Glaucomatous Visual Field Changes | IOVS | ARVO Journals
Purpose: : To examine the relationship between retrobulbar blood flow and visual field progression parameters in patients with primary open angle glaucoma (OAG). Methods: : An analysis of 73 patients with OAG (mean age 68.5; 38 female) who completed 2 years of follow up in the Indianapolis Glaucoma Progression Study was performed. Retrobulbar blood flow was assessed by color Doppler imaging (CDI) in the ophthalmic artery (OA), central retinal artery (CRA), temporal (TPCA) and nasal (NPCA) short posterior ciliary arteries measuring peak systolic (PSV) and end diastolic (EDV) blood flow velocities and vascular resistance (RI). Visual field mean deviation defect (MD), pattern standard deviation defect (PSD) and calculated advanced glaucoma intervention (AGIS) score as measured by Humphrey Visual Field Analyzer using the 24-2 SITA standard algorithm was performed. Multivariable linear regression models with rank-transformed data were analyzed for the change from baseline for each measurement with ...
The role of retrobulbar and retinal circulation on optic nerve head and retinal nerve fibre layer structure in patients with...
Methods In this observational study, 103 patients with OAG were examined at baseline and 18 months follow-up. Retrobulbar blood flow was measured by colour Doppler imaging in the ophthalmic, central retinal and temporal posterior ciliary artery (TPCA) and nasal short posterior ciliary artery. Retinal capillary blood flow was measured by confocal scanning laser Doppler. Peripapillary retinal nerve fibre layer thickness was assessed by optical coherence tomography. Non-parametric Wilcoxon signed ranks tests were used to assess for any statistically significant changes between the baseline and 18-month visits for the retrobulbar and retinal flow, as well as the structural parameters.. ...
Visual function, optic nerve structure, and ocular blood flow parameters after 1 year of glaucoma treatment ith fixed...
TY - JOUR. T1 - Visual function, optic nerve structure, and ocular blood flow parameters after 1 year of glaucoma treatment ith fixed combinations. AU - Januleviciene, Ingrida. AU - Ehrlich, Rita. AU - Siesky, Brent. AU - Nedzelskiené, Irena. AU - Harris, Alon. PY - 2009. Y1 - 2009. N2 - Purpose. To compare the effects of latanoprost/timolol (LTFC) versus dorzolamide/timolol (DTFC) fixed combinations on intraocular pressure (IOP), visual function, and retrobulbar blood flow in patients with open-angle glaucoma (OAG). Methods. This was a prospective, randomized, double masked, parallel study on 30 patients with OAG. All patients received 4 weeks of timolol treatment prior to randomization to LTFC or DTFC treatment. Measurements after randomization were taken at 1, 6, and 12 months, including arterial blood pressure; IOP; color Doppler imaging of the ophthalmic artery (OA), central retinal artery, and short posterior ciliary artery (SPCA); scanning laser polarimetry; Humphrey visual field ...
Impingement and loosening of the long posterior wall acetabular implant. - Nuffield Department of Orthopaedics, Rheumatology...
Long posterior wall (LPW) Charnley acetabular implants are widely used as it is believed that the LPW helps to prevent dislocation. This has, however, not been proven statistically. In a preliminary study of these implants removed at revision marked erosion of the LPW was frequently seen, indicating that repetitive impingement may occur. The influence of the long posterior wall was therefore investigated mathematically. LPW and standard sockets were found to be equally likely to dislocate provided that the standard socket was anteverted 5 degrees more than the LPW socket. With simulated external rotation, LPW sockets impinge 30% earlier than standard sockets. When impingement occurs a torque is applied to the components, which increases the shear stresses at the cement-bone interface. The torques, although not large enough to dislodge the socket immediately, are repetitive and so may contribute to loosening. The LPW socket can generate twice as much torque as the standard socket and therefore is more
Robinson, Yohan (0000-0002-2724-6372)
Background: Spinal fractures related to AS are often treated by long posterior stabilisation. The biomechanical rationale behind is the neutralisation of long lever arms in the ankylosed spine to avoid non-union or neurological deterioration. Despite the widespread application of long posterior instrumentation it has never been investigated in a biomechanical model. The objective of this study is to develop a finite element model for spinal fractures related to AS and to establish a biomechanical foundation for long posterior stabilisation of cervicothoracic fractures related to ankylosing spondylitis (AS).. Methods: An existing finite element-model (consisting of two separately developed models) including the cervical and thoracic spine were adapted to the conditions of AS (all discs fused, C0-C1 and C1-C2 mobile) and a fracture at the level C6-C7 was simulated. Besides a normal spine (no AS, no fracture) and the uninstrumented fractured spine four different posterior transpedicular ...
Localisation of thromboxane A2 receptors and the corresponding mRNAs in human eye tissue. | British Journal of Ophthalmology
Thromboxane A2 (TxA2) receptors in human eye sections were identified and localised using a potent TxA2 specific agonist, 125-iodinated 5-heptenoic acid 7-[3-[3-hydroxy-4-[4-(iodo-125I) phenoxy]-1-butenyl]-7- oxabicyclo[2.2.1]hept-2-yl]-,[1S-[1a,2a,(Z),3B(1E,3S*),4a]]-C23 H29 IO5 (125I-BOP) in a binding assay. TxA2 receptors were concentrated in several specific loci within ocular tissues, including the corneal epithelium, the ciliary processes, retina, and posterior ciliary arteries. In addition, we have used the method of in situ hybridisation to observe the distribution of TxA2 receptor mRNA. The distributions of both receptor binding sites and receptor mRNAs showed a close correlation. These studies employed film autoradiography which does not permit cellular resolution. In order to obtain enhanced cellular resolution and more detailed information about the localisation of the receptors and their corresponding mRNAs, emulsion autoradiography was used after ligand binding and in situ ...
Relationship between ocular perfusion pressure and retrobulbar blood flow in patients with glaucoma with progressive damage
The present findings suggest that alterations in ocular blood flow regulation may contribute to the progression in glaucomatous damage.
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Ashley Meyer, LPCA - Greensboro, NC - Counseling | Healthgrades.com
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Fishes of Libong Island
D VIII - I, 21 - 24; A II - I, 18 - 20; GR 9 - 11 + 22 - 26 = 32 - 37. Body elongated, compressed, somewhat slender; dorsal and ventral profiles almost equally convex. Small conical teeth irregularly arranged in a row on both jaws; vomerine tooth patch arrowhead-shaped with a long posterior extension. Breast usually scaled completely; straight part of lateral line with 4 - 12 scales followed by 23 - 34 scutes. Color: body silvery blue-gray dorsally, silvery white ventrally; tip of anterior rays of second dorsal fin jet-black distally with white margin; caudal fin yellow. Size: maximum length about 22 cm. Distribution: Indo-West Pacific, from Persian Gulf to Philippines and Indonesia. Remarks: occurring in coastal waters ...
Color Doppler Imaging of the Ocular Ischemic Syndrome<...
TY - JOUR. T1 - Color Doppler Imaging of the Ocular Ischemic Syndrome. AU - Ho, Allen C.. AU - Lieb, Wolfgang E.. AU - Flaharty, Patrick M.. AU - Sergott, Robert C.. AU - Brown, Gary C.. AU - Bosley, Thomas M.. AU - Savino, Peter J.. PY - 1992/1/1. Y1 - 1992/1/1. N2 - Purpose: This study describes hemodynamic characteristics of the ophthalmic, central retinal, and posterior ciliary arteries in 16 eyes of 11 patients with the ocular ischemic syndrome. Understanding the hemodynamic characteristics of the retrobulbar circulation may elucidate the natural history and pathophysiology of the ocular ischemic syndrome and perhaps form the basis for rational treatment of this condition. Methods: Color Doppler imaging, a procedure that permits rapid noninvasive imaging of the ophthalmic, central retinal, and posterior ciliary arteries, was used to quantitate peak systolic blood flow velocities and vascular resistance (pulsatility index) within these vessels in study group eyes and in an age-matched ...
Ranibizumab Therapy for Non-arteritic Ischemic Optic Neuropathy - Full Text View - ClinicalTrials.gov
Nonarteritic anterior ischemic optic neuropathy (NAION) is the most common acute optic neuropathy in people older than 50 years. It is characterized by sudden partial loss of vision in one eye and has an increased risk of vision loss in the fellow eye. Although cause has not been determined, NAION is thought to occur following an idiopathic ischemic event involving the short posterior ciliary arteries that supply blood to the most anterior part of the optic nerve. A complete loss of vision is rare, but partial loss of visual field or acuity can result from NAION in the affected eye(s).. Patients who have a disc at risk or crowded disc (small cup: disc ratio) are at increased risk for developing NAION. Other risk factors for NAION include age , 50 years and white race (estimated 95% of cases). Hypertension and diabetes also predispose to NAION development. Other factors that have been associated with NAION include high cholesterol, arteriosclerosis, stroke, cardiac and intraocular surgery, ...
Anterior ciliary arteries definition | Drugs.com
Definition of anterior ciliary arteries. Provided by Stedmans medical dictionary and Drugs.com. Includes medical terms and definitions.
Thrombophilic risk factors in the pathogenesis of non-arteritic anterior ischemic optic neuropathy patients.
BACKGROUND: Non-arteritic anterior ischemic optic neuropathy (N-AION) is caused by acute ischemic infarction of the optic nerve head, supplied by the posterior ciliary arteries. Thrombophilia is the tendency/predisposition to vascular thromboses of a
Optical coherence tomographic angiography shows reduced deep capillary by K. K. Dansingani, M. Inoue et al.
IntroductionParacentral acute middle maculopathy (PAMM) has been described as an ischemic lesion of the middle retinal layers with a characteristic lamellar hyper-reflective placoid appearance in the acute phase and thinning of the involved retinal layers in the chronic phase. Optical coherence tomographic angiography (OCTA) is a novel and non-invasive technique for imaging retinal capillary vasculature with en face segmentation capabilities.MethodCase series. We describe two patients with PAMM who underwent clinical examination and multimodal imaging including OCTA.ResultsIn the first patient, who presented with PAMM secondary to acute cilioretinal artery occlusion, OCTA demonstrated reduction in flow in the deep capillary plexus (DCP). One month later, OCTA revealed a flow void due to thinning of the GCL, INL, and OPL and paradoxical apparent ONL thickening. Similar findings of focal retinal lamellar ectopia were seen in the second patient, who had an incidentally detected chronic PAMM lesion
LPCA - What does LPCA stand for? The Free Dictionary
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Ischemic Optic Neuropathy - AION - Choroidal Ischemia - Non-Arteritic - Non-Arteritic Anterior Ischemic Optic Neuropathy -...
68-year-old woman noticed central vision loss in the right eye about a week ago. It is getting a little bit better. OD 20/160, OS 20/25 ...
Ischemic Optic Neuropathy - AION - Choroidal Ischemia - Non-Arteritic - Non-Arteritic Anterior Ischemic Optic Neuropathy -...
68-year-old woman noticed central vision loss in the right eye about a week ago. It is getting a little bit better. OD 20/160, OS 20/25 ...
Biometric and physiological factors in human ocular perfusion - Aston Research Explorer
By addressing the vascular features that characterise myopia, this thesis aims to provide an understanding of the early structural changes associated with human myopia and the progression to co-morbidity with age. This thesis addresses three main areas of study: 1. Ocular perfusion features and autoregulatory mechanisms in human myopia; 2. Choroidal thickness at the macular area of myopic eyes; 3. Effect of chronic smoking on the ocular haemodynamics and autoregulation. This thesis demonstrated a reduced resting ocular pulse amplitude and retrobulbar blood flow in human myopia, associated with an apparent oversensitivity to the vasodilatory effects of hypercapnia, which may be due to anatomical differences in the volume of the vessel beds. In young smokers, normal resting state vascular characteristics were present; however there also appeared to be increased reactivity to hypercapnia, possibly due to relative chronic hypoxia. The systemic circulation in myopes and smokers over-reacted similarly ...
Hi there. Is the job done? Oh, sorry. That was supposed to go to my hitman. All these different conversations Im having at the same…. ...
Central retinal artery - Wikipedia
Thus if the central retinal artery gets occluded, there is complete loss of vision in that eye even though the fovea is not affected. The entire retina (with the exception of the fovea) becomes pale and swollen and opaque while the central fovea still appears reddish (this is because the choroid color shows through). This is the basis of the famous Cherry red spot seen on examination of the retina on funduscopy of a central retinal artery occlusion (CRAO). However it should be remembered that the Cilio retinal artery itself is a branch of the Short Posterior Ciliary Arteries which is derived from the Ophthalmic Artery. Therefore, its possible for the cilio retinal artery itself to occlude causing significant visual loss in the perfused macula region (surrounding visual field will remain intact). ...
Journal of Retina-Vitreous
4İnönü Üniversitesi Tıp Fakültesi, Pediatri A.D., Malatya, Doç. Dr. In our study, we aim to present an interesting case who developed central retinal artery occlusion with preserved central vision because of the presence of cilioretinal artery. A 17-year-old man appealed to our clinic with the complaint of visual loss in the right eye (seeing only the center where the eyes stare at, but not surroundings) suddenly begun 3 months ago. On the examination, visual acuity of the right eye was 10/10, anterior segment examination was normal. On fundus examination, optic nerve head pallor was observed. The examination of the left eye was normal. The computerized visual field revealed concentric narrowing of visual field in the right eye. Since neurologic examination and VEP examination were normal, we carefully reexamined the fundus, and recognized the presence of cilioretinal artery in the right eye. Given these findings, the diagnosis of the previous occlusion of central retinal artery in the ...
The porcine retinal vasculature can be accessed using an endovascular approach, a new experimental model for retinal ischemia. ...
Purpose. The aim was to examine if the retinal circulation in the pig can be accessed using interventional neuroradiology and to explore the possibility to create occlusions that result in experimental retinal ischemia. Methods. Six experiments were performed using 100 kg pigs. The external carotid system was catheterizised using fluoroscopy monitored, transfemoral, endovascular approach. Transient and permanent vascular occlusions were performed using an angioplasty balloon catheter or a liquid embolic agent that was administered via an injection-catheter. Results. A technique for transfemoral catheterization of arteries supplying the retina was established. The ophthalmic artery was demonstrated to give rise to the main ciliary artery, from which the retinal artery branched as a single or several arteries. A balloon-catheter could be introduced into the ophthalmic artery, but not into the main ciliary artery. An injection-catheter could, in all experiments, be introduced into the main ciliary ...
GCA causes vasculitis characterized by granulomatous inflammation in the wall of medium-size and large arteries and preferentially affects extracranial branches of the carotid artery1. Occlusion of the posterior ciliary arteries leading to anterior ischemic optic neuropathy is the most frequent complication, but cerebral arteries can also be involved, leading to cerebral infarction. Nesher, et al2 reported cranial ischemic complications (including visual loss and stroke) in 25% of a group of patients with GCA, but Wiszniewska, et al3 found only 0.15% of stroke in a population of 4086 patients with GCA. Vertebral arteries are more likely affected than internal carotid arteries, especially in the extradural portion, where there is more elastic tissue4. Our patients cerebral angiography showed multiple stenosis of this portion of the right vertebral artery, but the intracranial portion and the basilar artery were of normal diameter without stenosis (Figure 1B). Involvement of intracranial arteries ...
Clinical application value of color doppler ultrasound in detecting ocular hemodynamics in cataract patients - Panminerva...
Shiqin JIANG 1, Yan WEN 2 ✉, Jingjing ZHANG 3. 1 Department of Ultrasound, Shandong Provincial Third Hospital, Cheeloo College of Medicine, Jinan, China; 2 Department of Ophthalmology, Shandong Provincial Third Hospital, Cheeloo College of Medicine, Jinan, China; 3 Dongying Aier Eye Hospital, Dongying, China. ...
LPCA Partners with Certintell to Accelerate Telehealth Adoption for Louisiana Community Health Centers
Louisiana Primary Care Association (LPCA) has chosen Certintell Telehealth as the trusted vendor to bring software, infrastructure and training to the 38 federally funded Community Health Center organizations across Louisiana. These organizations...
resistivity】什么意思 英语resistivity的翻译 音标 读音 用法 例句 在线翻译 有道词典
Volume resistivity [电] 体积电阻率 ; 体积电阻 ; [电] 体积电阻系数 ; 体电阻率 thermal resistivity [物] 热阻率 ; 热电阻系数 ; 阻系数 resistivity survey 电阻率甸 ; 电阻测探法 ; 比电阻测勘法 ; 电阻勘探法 mass resistivity [电] 质量电阻率 ; 比电阻 ; 电阻率 ; 质量电阻系数 soil resistivity [土壤] 土壤电阻率 ; 电阻率 ; 土壤阻抗 ; 土坝电阻率 Resistivity calculations 电阻率计算 resistivity index [电] 电阻率指数 ; 阻力指数 ; 电阻率增大系数 ; 电阻增大率 resistivity profiling [地质] 电阻率剖面法 resistivity gradient 电阻率梯度 ...
Evaluation of Retrobulbar Blood Flow with Color Doppler Ultrasonography in Patients with Central Serous Chorioretinopathy |...
Background. To compare retrobulbar blood flow in patients with central serous chorioretinopathy (CSC) and healthy subjects using color Doppler ultrasonography. ...
Non-arteritic ischemic optic neuropathy and supplemental nitric oxide usage<...
TY - JOUR. T1 - Non-arteritic ischemic optic neuropathy and supplemental nitric oxide usage. AU - Hu, Jimmy Yan. AU - Katz, Barrett. N1 - Funding Information: No funding or grant support. Publisher Copyright: © 2018. PY - 2018/9. Y1 - 2018/9. N2 - Purpose: To report a case of Non-Arteritic Ischemic Optic Neuropathy (NAION) in a middle-aged bodybuilder in excellent physiological condition without any signs or symptoms of vasculopathy and a history of nitric oxide supplement usage. Observations: The patient had visual acuity of 20/25 in the right eye, and 20/30 in the left eye, with a relative afferent pupillary defect and dyschromatopsia in the right eye. Visual field testing with Humphrey perimetry demonstrated an inferior altitudinal field defect OD. Fundus examination showed a small cupless disc OD with mild pallor, and a small cupless disc OS. He denied usage of sildenafil or other phosphodiesterase (PDE) inhibitor medications but frequently ingested megadoses of nitric oxide (NO) as part of ...
Incidence of Proximal Junctional Kyphosis (PJK) in Long Posterior Spinal Fusion: A Study Comparing Traditional Open Surgery to...
The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details ...
Calf Muscle Injection Treatment
A central retinal artery occlusion is caused by arteriosclerosis, small emboli from cardiac arhythmias, temporal arteritis, and many other causes. The central vision can sometimes be maintained if there is an anomylous cilio-retinal artery, otherwise there is profound sudden loss of vision which is often unreversible unless treated within a short period of time ...
The expression of Delta ligands in the sponge Amphimedon queenslandica suggests an ancient role for Notch signaling in metazoan...
Prior to pigment spot formation, there is no distinctive cell population found specifically at the future position of the posterior ciliated cells (Figure8A). By spot stage, cells just anteriolateral to the pigment spot are distinguished from the surrounding epithelial cells due to their columnar morphology and alignment (Figure8A), coincident with the spatial expression of AmqNotch and AmqDelta4 at this stage (Figures 5B and7B). In late ring embryos, these cells have further elongated internally, and are polarized; nuclei are basal, cilia are apical and the cells are in small clusters (Figure8A). The expression of AmqNotch and AmqDelta4 is now also seen in a narrower domain that lies just below the surface of the embryo (Figures 5D,D and 7E). The larval expression of AmqDelta4 remains in the region under the pigment ring, the presumptive location of the nuclei of the cells bearing the long posterior cilia (Figure5E).. At the anterior pole of the A. queenslandica larva is a cluster of ...
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Retrobulbar blood flow and visual organ function disturbance in the course of giant cell arteritis coexisting with optic disc...
Information about the open-access article Retrobulbar blood flow and visual organ function disturbance in the course of giant cell arteritis coexisting with optic disc drusen - a case report in DOAJ. DOAJ is an online directory that indexes and provides access to quality open access, peer-reviewed journals.
A PROSPECTIVE STUDY TO INVESTIGATE NEUROCOGNITIVE PERFORMANCE IN essay Essay - Free college essays
Objective: The impact of major spinal surgery on cognitive functionremains speculative. There are presently limited studies availableconcerning the cognitive dysfunctions in terms of nature and courseafter a major spinal surgery. In this longitudinal cohort study, weexamined the effect of major spinal surgery on cognitive functioning.The other objective of the study is to find the correlation betweenthe risk factors and cognitive functioning after major spinal surgerywith general anesthesia.. Methods:This is a prospective analysis of thirty-two patients enrolled beforeundergoing elective lumbar spine surgery. Seventeen patientsscheduled for lumbar decompression without instrumentation served asa control group and fifteen patients scheduled for major spinalsurgery such as spinal decompression with long posterior instrumentedfusion served as an experimental group.  An examineradministered the Montreal Cognitive Assessment (MoCA) test to bothsubjects to evaluate cognitive abilities ...
HIRUDINARIA-EXCRETORY SYSTEM-NEPHRIDIUM STRUCTURE FUNCTION | BIOZOOM
In HIRUDINARIA the excretory system includes 17 pairs of Nephridia. They are arranged in 6th to 22nd segments, one pair in each segment. In these 17 pairs the first six pairs will not show contact with testis. They are called pre-testicular nephridia. The next 11 pairs of nephridia will show contact with testis, hence they are called testicular nephridia.. Structure of Testicular Nephridium: Each nephridium contains six regions. 1) Main lobe 2) Vesicle 3) Apical lobe 4) Inner lobe 5) Initial lobe 6) Ciliated organ. 1) Main lobe: It is the bigger part of the nephridium. It is present in between two adjacent crop caecae. It has short posterior and long anterior limbs. They are free in the median axis. They are used externally. It looks like a horse shoe. 2) Vesicle : It is a thin walled large chamber. It shows inner ciliated epithelium. It is present behind the main lobe. It gets a vesicle duct from the ventral end of the anterior limb of the main lobe. This vesicle takes up storage of excretory ...
SUMMARY: We report 11 patients who were referred to our institution for severe open-angle glaucoma who had a paraoptic cyst on MR imaging. All cysts were extraoptic and retrolaminar; most were deforming the adjacent optic nerve. Cysts had a high signal on T2 and FLAIR sequences, and a variable signal on T1 and variable echogenicity, suggesting different proteinaceous content. Arterial vascularization of the optic nerve was normal. Cyst volumes were inversely correlated with the severity of glaucoma on the same eye (P , .01-.05, Spearman correlation coefficient). We hypothesized that such cysts may reflect a valve mechanism, which would allow preservation of the translamina cribrosa pressure and thus could preserve visual function. The rarity of this association, together with the frequent mass effect of the cyst on the optic nerve, stresses the necessity of long-term follow-up in these patients.. ...
Non-arteritic Anterior Ischemic Optic Neuropathy (NAION)
Non-arteritic Anterior Ischemic Optic Neuropathy (NAION or NAAION) is a condition that occurs when blood flow to the optic nerve is blocked. Non-arteritic Anterior Ischemic Optic Neuropathy, sometimes called eye stroke, is characterized by rapid vision loss or blindness that may occur over minutes, hours, or sometimes days. Risk factors for Non-arteritic Anterior Ischemic Optic Neuropathy include high blood pressure, diabetes, and atherosclerosis.. In rare cases, Non-arteritic Anterior Ischemic Optic Neuropathy has occurred in patients taking PD5 inhibitors, such as Cialis, Viagra, and Levitra. If you or a loved one took Cialis, Viagra, or Levitra and experienced a serious side effect, such as NAION, you may be entitled to compensation for your injuries. Contact our experienced personal injury attorneys today for a confidential and free case evaluation. ...
6. Arterial Inefficiencies
Central retinal artery occlusion is a relatively rare emergent condition of the eye resulting in sudden painless vision loss. This vision loss is usually dramatic and permanent and the prognosis is poor. Patients particularly at risk include those with giant cell arteritis, atherosclerosis, and thromboembolic disease, a wide variety of treatment modalities have been tried over the last one hundred years with little to no success, with the exception of hyperbaric oxygen therapy.. The arterial blood supply to the eye is provided by the ophthalmic artery, one of the branches of cavernous portion of the internal carotid artery. Some of the branches of the ophthalmic artery (lacrimal, supraorbital, ethmoidals, medial palpebral, frontal, dorsal nasal) supply orbital structures, while others (central artery of the retina, short and long posterior ciliaries, anterior ciliaries) supply the tissues of the globe. The central retinal artery enters the globe within the substance of the optic nerve and serves ...
Circulatory parameters in the retrobulbar central retinal artery and vein of patients with diabetes and medically treated...
Abstract BackgroundÂ Â We aim to study the circulatory parameters in the retrobulbar central retinal artery and vein in diabetic patients with and without medically treated systemic hypertension. MethodsÂ Â The study included 108 patients with diabetes that were allocated in four different groups according to the presence of diabetic retinopathy (DR) and hypertension: group 1â€patients without DR and without hypertension (nâ€‰=â€‰23), group 2â€patients without DR and with hypertension (nâ€‰=â€‰21), group 3â€patients with nonproliferative DR and without hypertension (nâ€‰=â€‰36), group 4â€patients with nonproliferative DR and with hypertension (nâ€‰=â€‰28). The circulatory parameters that were evaluated were: peak systolic blood velocity (PSV), end-diastolic blood velocity (EDV), maximum venous velocity (Vmax), minimum venous velocity (Vmin) and the Pourcelot index which were measured using color Doppler imaging. Non-parametric tests ...
Retinal Artery | Profiles RNS
Central retinal artery and its branches. It arises from the ophthalmic artery, pierces the optic nerve and runs through its center, enters the eye through the porus opticus and branches to supply the retina ...
Central Retinal Artery OcclusionCME Activity
StatPearls and ETSU adhere to ACCME Standards regarding commercial support of continuing medical education. It is the policy of StatPearls and ETSU that the faculty and planning committee disclose real or apparent conflicts of interest relating to the topics of this educational activity, that relevant conflict(s) of interest are resolved, and also that authors and editors will disclose any unlabeled/unapproved use of drug(s) or device(s) during their presentation. Detailed disclosure will be made prior to starting the activity.. The information provided at this CME/CE activity is for continuing education purposes only and is not meant to substitute for the independent medical/clinical judgment of a healthcare provider relative to diagnostic and treatment options of a specific patients medical condition.. ...
Retinal Artery Occlusion | Retina Specialists of North Alabama, LLC
A doctor may also order a test of your bloods sedimentation rate, and a temporal artery biopsy may be useful if giant cell arteritis is suspected.. Vision loss with CRAO is usually severe. However, CRAOs in patients who have a cilioretinal artery have better visual prognosis, usually recovering to 20/50 vision or better in over 80% of eyes. Visual field loss in BRAO is usually permanent, but central visual acuity may recover to 20/40 or better in 80% of eyes.. Formation of new blood vessels of the retina or iris that are prone to bleed is a rare complication seen after a CRAO or BRAO. Growth of these vessels can further decrease vision by causing vitreous hemorrhage and glaucoma. If this happens, laser photocoagulation therapy is used to create burns in the area of the blocked artery to try to lower the oxygen demand of the retina and thus stop the abnormal blood vessels from growing.. Intravitreal injections of anti-VEGF medications such as Avastin® (bevacizumab), Lucentis® (ranibizumab) or ...
Results of ocular hemodynamics in chronic ocular ischemic syndrome after bilateral carotid endarterectomy | AVESİS
Background: The aim of this study was to investigate the effect of carotid endarterectomy on chronic ocular ischemic syndrome due to internal carotid artery stenosis progressed with transient ischemic attacks (TIAs). ...
Central Retinal Artery Occlusion - JOMTonline.com
What is Central Retinal Artery Occlusion?. The central retinal artery branches off the ophthalmic artery which in turn branches off the internal carotid artery. The central retinal artery is vital because it supplies blood to the inner two-thirds of the retina. . If the central retinal artery becomes occluded, there will be a sudden painless loss of vision in that eye.. Central retinal artery occlusion (CRAO) is generally due to an embolism including platelet-fibrin, cholesterol, or calcium plaque. The emboli break off vessel walls ...
Anatomy of the Ocular Fundus | Eccles Health Sciences Library | J. Willard Marriott Digital Library
A review of normal features of the ocular fundus. Fundus photography using various techniques illustrate anatomic features of the ocular fundus. - Figure 1 : A) Color fundus photograph of the left optic disc and peripapillary retina showing a normal optic disc, retinal arteries, retinal veins, and retinal nerve fiber layer. B) Magnified photograph of a normal retinal artery and retinal vein with a normal arteriolar light reflex. - Figure 2 : A) Color fundus photograph of the posterior pole in the right eye showing normal superior and inferior vascular arcades and macula. B) Magnified photograph of a normal macula and fovea. C) Posterior pole photograph illustrating that the temporal retina is divided from the nasal retina by an imaginary vertical line through the fovea. - Figure 3 : Color fundus photograph of right eye optic disc and peripapillary retina showing a normal optic cup and optic disc with a cup-to-disc ratio of 0.4. A cilioretinal artery is observed in the lower left portion of the
Abstract 3354: Posterior Mitral Leaflet/Left Ventricular Cavity Mismatch is an Important Factor for Development of Systolic...
Introduction: The venturi effect, flow drag effect and abnormal mitral valve apparatus have all been implicated in the development of systolic anterior motion (SAM) of mitral valve among HCM patients. Nevertheless, SAM has also been shown to occur in the absence of HCM or abnormal mitral apparatus. A long posterior mitral leaflet (PML) in relation to the LV cavity may move the coaptation point of the leaflets anteriorly during systole, thus exposing the PML/AML to the flow drag effect of the ejecting blood.. Hypothesis: We hypothesize that a simple mismatch between PML length and LV cavity i.e. a high PML/LV internal diameter in systole (LVIDS) ratio is an important factor for SAM of mitral valve to occur in HCM patient. The null hypothesis is there was no difference in the PML/LVIDS ratio among HCM patients, with or without SAM.. Methods: Consecutive 74 patients who were diagnosed to have HCM with asymmetrical septal hypertrophy(ASH) from our echocardiography laboratories from November 2007 ...
medicine: HORNERS SYNDROME
Sympathetic innervation to the eye consists of a three neuron arc. The first neuron originates in the hypothalamus. It descends and travels between the levels of the eighth cervical and forth thoracic vertebrae (C8-T4) of the spinal cord. There, it synapses with second order neurons whose preganglionic cell bodies give rise to axons. These axons pass over the apex of the lung and enter the sympathetic chain in the neck, synapsing in the superior cervical ganglion. Here, cell bodies of third order neurons give rise to postganglionic axons that course to the eye via the cavernous sinus. These sympathetic nerve fibers course anteriorly through the uveal tract and join the fibers of long posterior ciliary nerves to innervate the dilator of the iris. Postganglionic sympathetic fibers also innervate the muscle of Mueller within the eyelid, which is responsible for the initiation of eyelid retraction during eyelid opening. Postganglionic sympathetic fibers, responsible for facial sweating, follow the ...
Visual outcome of mega-dose intravenous corticosteroid treatment in non-arteritic anterior ischemic optic neuropathy -...
Lack of available treatment for patients with NAION is a source of discomfort for the neuroophthalmologist. Various agents and procedures for NAION treatment have been suggested, but most without encouraging results.. The idea of treating NAION with corticosteroids is that relieving the pressure on the axons during the acute phase (when the optic disc is edematous) may prevent further damage to the optic nerve. Therefore, in most studies corticosteroids were administered in the acute phase, which is believed to be within the first 2 weeks . This therapeutic window is also supported by animal models  as well as the common clinical experience of general progression in visual loss during this period, with stabilization thereafter . For this reason the IONDT  also allowed a 2-week therapeutic window for the decompression to be made (for regular-entry patients). In our study all patients also received treatment within 2 weeks of onset.. The largest series to date reporting ...
Reduced central retinal artery blood flow is related to impaired central visual function in retinitis pigmentosa patients -...
Kayser, S., Vargas, P., Mendelsohn, D., Han, J., Bi, H., Benavente, A., & Bittner, A. K. (2017). Reduced Central Retinal Artery Blood Flow Is Related to Impaired Central Visual Function in Retinitis Pigmentosa Patients. Current Eye Research, 42(11), 1503-1510.. ...
Therapeutic decisions involving disparate clinical outcomes: patient preference survey for treatment of central retinal artery...
The value persons place on vision when weighed against the risk of stroke or death varies considerably. More persons are willing to accept life-threatening risks if they are monocular. The reasons physicians and medical students are more likely to accept serious risks to improve vision than nonphysi …
Carbon Sensor Resistivity Meter - HORIBA
HORIBA offers the Carbon Sensor Resistivity Meter applicable to Single-Bath Cleaning systems, offers superior Resistance to Chemicals
Additional branches of the ophthalmic artery include the ciliary arteries, which branch into the anterior ciliary arteries. ... The exact number and arrangement of these ciliary arteries may vary. Branches of the infraorbital artery supply the inferior ... Each rectus muscle receives blood from two anterior ciliary arteries, except for the lateral rectus muscle, which receives ... This is done either directly or indirectly, as in the lateral rectus muscle, via the lacrimal artery, a main branch of the ...
Posterior ischemic optic neuropathy
The anterior optic nerve receives blood primarily from the posterior ciliary arteries. The anterior optic nerve, a.k.a. the ... When T-cells damage arteries supplying the optic nerve, a blood clot forms and stops blood flow. When blood flow stops, oxygen ... A sample (biopsy) of the temporal artery should be obtained to confirm the diagnosis and guide future management, but should ... The posterior optic nerve receives blood primarily from the pial branches of the ophthalmic artery. The optic canal, a boney ...
A cycloanemization is a surgical obliteration of the long ciliary arteries in the treatment of glaucoma. An ... A cyclectomy is an excision of portion of the ciliary body. A cyclotomy, or cyclicotomy, is a surgical incision of the ciliary ... A ciliectomy is the surgical removal of part of the ciliary body or the surgical removal of part of a margin of an eyelid ... A corectomedialysis, or coretomedialysis, is an excision of a small portion of the iris at its junction with the ciliary body ...
Larvae are thought to enter the eye through the optic nerve, central retinal artery, short posterior ciliary arteries, soft ...
... may refer to Circulus arteriosus major, an anastomosis of the anterior ciliary arteries Circulus arteriosus ...
... rupture of long posterior ciliary artery from progressive stretching with progressive serous choroidal detachment; usually ... into a cyclodialysis cleft between the ciliary body and the sclera if tissue is dissected posterior to the scleral spur.[ ...
Circulus arteriosus major
... is formed by anastomosis of the anterior ciliary arteries with the Long posterior ciliary arteries at the ciliary body. It ... supplies the iris, ciliary body and choroid. The veinous drainage of CIA is : 4 vortex veins that drain into the ophthalmic ...
... nerve branches Trochlear nerve branches Ophthalmic nerve branches Abducent nerve branches Ciliary ganglion Ophthalmic artery ...
Index of anatomy articles
... tympani Chorionic villi choroid choroid plexus chyle ciliary arteries ciliary body ciliary ganglion ciliary muscle ciliary ... artery left common carotid artery left gastroepiploic artery left mainstem bronchi left marginal artery left pulmonary artery ... atrium right colic artery right common carotid artery right gastroepiploic artery right mainstem bronchi right marginal artery ... cerebellar artery posterior lobe of the cerebellum posterior nasal artery posterior septal artery posterior spinal arteries ...
... any emboli arising from vasculature preceding the retinal artery, ophthalmic artery, or ciliary arteries may cause this ... ophthalmic artery, or ciliary artery blood flow, leading to a decrease in retinal circulation which, in turn, causes retinal ... Giant cell arteritis can result in granulomatous inflammation within the central retinal artery and posterior ciliary arteries ... and/or ciliary arteries, causing decreased blood flow to the ipsilateral retina; examples being those arising due to (1) atrial ...
... advantages of being a quicker procedure that involves less trauma than a resection and preserves the anterior ciliary arteries ...
... supplied by the long and short posterior ciliary arteries, while the surrounding retina is pale due to retinal artery ... A cherry-red spot is a finding in the macula of the eye in a variety of lipid storage disorders and in central retinal artery ... The cherry red spot is seen in central retinal artery occlusion, appearing several hours after the blockage of the retinal ... central retinal artery occlusion) Drugs: Quinine toxicity Dapsone toxicity Poisoning: Carbon monoxide Methanol Blunt ocular ...
... supplied in humans by posterior ciliary arteries, originating from the ophthalmic artery (a branch of the internal carotid ... Along with the ciliary body and iris, the choroid forms the uveal tract. The structure of the choroid is generally divided into ... The retinal circulation, on the other hand, derives its circulation from the central retinal artery, also a branch of the ... artery). The arteries of the uveal circulation, supplying the uvea and outer and middle layers of the retina, are branches of ...
The ophthalmic artery supplies the choroid via the short posterior ciliary arteries and the retina via the central retinal ... times are approximate 0 seconds - injection of fluorescein 9.5 sec - posterior ciliary arteries 10 sec - choroidal flush (or " ... late staining Fluorescein enters the ocular circulation from the internal carotid artery via the ophthalmic artery. ... retinal artery occlusions, edema of the optic disc, and tumors. Additionally, the transit time (the period between injection of ...
... ciliary arteries Anterior ciliary artery Central retinal artery Muscular artery anterior cerebral artery middle cerebral artery ... artery middle colic artery right colic artery intestinal arteries ileocolic artery arcuate artery interlobular artery afferent ... artery Sternocleidomastoid artery Superior laryngeal artery Cricothyroid artery Ascending pharyngeal artery Lingual artery ... artery proper hepatic artery Terminal branches right hepatic artery Cystic artery left hepatic artery right gastric artery ...
The anterior optic nerve is supplied by the short posterior ciliary artery and choroidal circulation, while the retrobulbar ... internal carotid artery, anterior cerebral artery, and anterior communicating arteries. Ischemic optic neuropathies are ... optic nerve is supplied intraorbitally by a pial plexus, which arises from the ophthalmic artery, ...
Outline of human anatomy
... artery Internal carotid artery Ophthalmic artery Central retinal artery Lacrimal artery Short posterior ciliary arteries Long ... artery Ileocolic artery Right colic artery Middle colic artery Inferior mesenteric artery Left colic artery Sigmoid arteries ... rectal artery Middle suprarenal artery Renal artery Ovarian artery Testicular artery Common iliac artery Internal iliac artery ... Uterine artery Vaginal artery Middle rectal artery Internal pudendal artery Inferior rectal artery Perineal artery Arteries of ...
... namely the ciliary body and annular suspension of the lens of the eye. The arteries of the choroid and iris. The greater part ... The ciliary muscle receives parasympathetic fibers from the short ciliary nerves that arise from the ciliary ganglion. The ... ciliary ganglion via the postganglionic parasympathetic fibers which travel in the short ciliary nerves and supply the ciliary ... The ciliary muscle is an intrinsic muscle of the eye formed as a ring of smooth muscle in the eye's middle layer, uvea ( ...
The anterior ciliary arteries are derived from the muscular branches of the ophthalmic artery. The ophthalmic artery and its ... The short posterior ciliary arteries from six to twelve in number, arise from the ophthalmic artery as it crosses the optic ... The long posterior ciliary arteries, two for each eye, pierce the posterior part of the sclera at some little distance from the ... The ciliary arteries are divisible into three groups, the long posterior, short posterior, and the anterior. ...
Short ciliary nerves
They run forward with the ciliary arteries in a wavy course. One bundle is set above the optic nerve, while the other bundle is ... Sympathetic connections of the ciliary and superior cervical ganglia. Pathways in the Ciliary Ganglion. Long ciliary nerves ... the postganglionic parasympathetics leave the ciliary ganglion in the short ciliary nerve and supply the ciliary body and iris ... The short ciliary nerves are nerves of the orbit around the eye. They are branches of the ciliary ganglion. They supply ...
Anterior ciliary arteries
The anterior ciliary arteries are branches of the ophthalmic artery and run to the front of the eyeball in company with the ... The anterior ciliary arteries are seven small arteries in each eye-socket that supply the conjunctiva, sclera and the recti ... Three of the four rectus muscles; the superior, inferior and medial, are supplied by two ciliary arteries each, while the ... They are derived from the muscular branches of the ophthalmic artery. ...
Posterior ciliary arteries
... may refer to: Long posterior ciliary arteries Short posterior ciliary arteries This disambiguation ... page lists articles associated with the title Posterior ciliary arteries. If an internal link led you here, you may wish to ...
Long posterior ciliary arteries
The long posterior ciliary arteries are arteries of the head arising, together with the other ciliary arteries, from the ... The long posterior ciliary arteries supply the iris, ciliary body and choroid. Short posterior ciliary arteries This article ... to the ciliary muscle, where they divide into two branches. These form an arterial circle, the circulus arteriosus major, ... Arteries of the head and neck, All stub articles, Cardiovascular system stubs). ...
Short posterior ciliary arteries
The short posterior ciliary arteries, around twenty in number, arise from the medial posterior ciliary artery and lateral ... in horizontal section Long posterior ciliary arteries Anterior ciliary arteries Gray's anatomy : the anatomical basis of ... and ciliary processes. Some branches of the short posterior ciliary arteries also supply the optic disc via an anastomotic ring ... posterior ciliary artery, which are branches of the ophthalmic artery as it crosses the optic nerve. They pass forward around ...
ciliares posteriores longae Short posterior ciliary arteries Aa. ciliares posteriores breves Anterior ciliary artery A. ... giving off 1 to 5 posterior ciliary arteries (PCA) that subsequently branch into the long and short posterior ciliary arteries ... anatomists made little distinction between the posterior ciliary arteries and the short and long posterior ciliary arteries ... The ophthalmic artery (OA) is an artery of the head. It is the first branch of the internal carotid artery distal to the ...
Central retinal artery
... the Cilio retinal artery itself is a branch of the Short Posterior Ciliary Arteries which is derived from the Ophthalmic Artery ... The central retinal artery (retinal artery) branches off the ophthalmic artery, running inferior to the optic nerve within its ... If this artery is present, the central vision will be preserved even in case of central retinal artery occlusion (CRAO). The ... The veins are darker in appearance than the arteries. (Central retinal artery visible but not labeled). Horizontal section of ...
கதிராளி - தமிழ் விக்கிப்பீடியா
long posterior ciliary arteries. நரம்பு. long ciliary nerves, short ciliary nerves. அடையாளங்காட்டிகள். ...
Roots of the ciliary ganglion
Their axons ascend with the internal carotid artery as a plexus of nerves, the internal carotid plexus. Sympathetic fibers ... The parasympathetic root of ciliary ganglion provides parasympathetic supply to the ciliary ganglion. The ciliary ganglion is a ... and the short ciliary nerves (from the ciliary ganglion). Sympathetic fibers in the short ciliary nerves pass through the ... They leave the ciliary ganglion in the sensory root of ciliary ganglion, which joins the nasociliary nerve-a branch of the ...
List of MeSH codes (A07)
... posterior cerebral artery MeSH A07.231.114.228.868 - temporal arteries MeSH A07.231.114.248 - ciliary arteries MeSH A07.231. ... radial artery MeSH A07.231.114.745 - renal artery MeSH A07.231.114.765 - retinal artery MeSH A07.231.114.814 - splenic artery ... carotid arteries MeSH A07.231.114.186.200 - carotid artery, common MeSH A07.231.114.186.200.210 - carotid artery, external MeSH ... celiac artery MeSH A07.231.114.228 - cerebral arteries MeSH A07.231.114.228.100 - anterior cerebral artery MeSH A07.231.114.228 ...
Cavernous nerve plexus
It communicates with the oculomotor, the trochlear, the ophthalmic and the abducent nerves, and with the ciliary ganglion, and ... is situated below and medial to that part of the internal carotid artery which is placed by the side of the sella turcica in ... distributes filaments to the wall of the internal carotid artery. The branch of communication with the oculomotor nerve joins ...
Central retinal artery occlusion. *Branch retinal artery occlusion. *Retinopathy *diabetic. *hypertensive. *Purtscher's ...
Macula of retina
"Posterior Cerebral Artery Stroke". Medscape Reference. Medscape. Retrieved 23 October 2011.. *^ Siegel, Allan; Sapru, Hreday N ... This selective sparing is due to the collateral circulation offered to macular tracts by the middle cerebral artery. ... In the case of occipitoparietal ischemia owing to occlusion of elements of either posterior cerebral artery, patients may ...
Retinal vessel analysis is a non-invasive method to examine the small arteries and veins in the retina which allows to draw ... Cycloplegic eye drops are applied to the eye to temporarily paralyze the ciliary muscle of the eye. ...
মানব শিশ্ন - উইকিপিডিয়া
লিঙ্গ ধমনী পৃষ্ঠ, deep artery of the penis, artery of the urethral bulb. ... পক্ষ্মল অঙ্গক (Ciliary body). *অক্ষিকাচ (অক্ষি পরকলা) (lens). *অক্ষিপট (Retina). *দর্শন স্নায়ু (Optic nerve) ...
টেমপ্লেট:মানবদেহের অঙ্গতন্ত্রসমূহ - উইকিপিডিয়া
ধমনী (Artery). *শিরা (Vein). *কৈশিকনালী (Capillary). *লোহিত রক্তকণিকা (Red blood cell). *অণুচক্রিকা (Platelet) ... পক্ষ্মল অঙ্গক (Ciliary body). *অক্ষিকাচ (অক্ষি পরকলা) (lens). *অক্ষিপট (Retina). *দর্শন স্নায়ু (Optic nerve) ...
The blood supply to the lacrimal gland is provided by the ophthalmic artery with its branch - the lacrimal artery, while the ... apparatus involves both the a sympathetic supply through the carotid plexus of nerves around the internal carotid artery, and ...
The intestinal atresia is of the "apple-peel" type, in which the remaining intestine is twisted around its main artery. The ... April 2016). "Strømme Syndrome Is a Ciliary Disorder Caused by Mutations in CENPF". Human Mutation. 37 (4): 359-63. doi:10.1002 ... an uncommon type in which the remaining portion of the intestine is found twisted around its main artery, and this usually ...
List of diseases (C)
... due to random ciliary orientation Ciliary dyskinesia, due to transposition of ciliary microtubules Ciliary dyskinesia- ... synostosis syndactyly jejunal atresia Coronaro-cardiac fistula Coronary arteries congenital malformation Coronary artery ... Chudley-Mccullough syndrome Churg-Strauss syndrome Chylous ascites Cicatricial pemphigoid Ciguatera fish poisoning Ciliary ... Carnitine-acylcarnitine translocase deficiency Carnosinase deficiency Carnosinemia Caroli disease Carotenemia Carotid artery ...
Exhaled nitric oxide
In the latter condition, inhaled NO is used as a diagnostic test of the response of the pulmonary arteries to vasodilators ( ... Low levels have been found in primary ciliary dyskinesia, bronchopulmonary dysplasia, and pulmonary arterial hypertension. ... In 1987, experiments with coronary arteries showed that nitric oxide was the long sought endothelium-derived relaxing factor. ...
... are used in the treatment of glaucoma by decreasing the production of aqueous fluid by the ciliary bodies of the eye and also ... channels in vascular smooth muscle cells of rabbit ear artery". Pflügers Arch. 417 (1): 117-9. doi:10.1007/BF00370780. PMID ...
From the ciliary ganglion postganglionic fibers pass through the short ciliary nerve to the constrictor pupillae of the iris ... It passes between the superior cerebellar (below) and posterior cerebral arteries (above), and then pierces the dura mater ... From the third one, a short thick branch is given off to the lower part of the ciliary ganglion, and forms its short root. All ... Pathways in the Ciliary Ganglion. Cross-sectional anatomy of the midbrain showing location of the nucleus of the oculomotor ...
List of OMIM disorder codes
DNAI1 Ciliary dyskinesia, primary, 10; 612518; KTU Ciliary dyskinesia, primary, 11; 612649; RSPH4A Ciliary dyskinesia, primary ... COL7A1 Transposition of the great arteries, dextro-looped 1; 608808; MED13L Treacher Collins mandibulofacial dysostosis; 154500 ... TXNDC3 Ciliary dyskinesia, primary, 7, with or without situs inversus; 611884; DNAH11 Ciliary dyskinesia, primary, 9, with or ... LRRC50 Ciliary dyskinesia, primary, 3, with or without situs inversus; 608644; DNAH5 Ciliary dyskinesia, primary, 6; 610852; ...
The arteries that leave the aortic arch are positioned symmetrically. There is no costocervical artery. There is no direct ... There are no ciliary muscles. The choroid is very thick and contains a fibrous tapetum lucidum. Like other toothed whales, the ... connection between the internal carotid artery and the vessels of the brain. Their circulatory system has adapted to dive at ...
List of medical mnemonics
... coronary/cerebrovascular/peripheral artery disease Eye - cataracts, retinopathy Skin - lipohypertrophy/lipoatrophy, necrobiosis ... Ptosis Anhydrosis Miosis Enophthalmos Loss of ciliary-spinal reflex Anisocoria DANISH: Dysdiadochokinesia / dysmetria Ataxia ...
The facial artery supplies the platysma and goes on as the angular artery, which connects with the branches of the arteria ... and the increased distance from the ciliary margin to the inferior-most point of the orbicularis oculi muscle (caused by ... Vascularisation The composite flap is vascularised by facial, angular and/or inferior orbital arteries. ... subcutaneous tissue and the skin as the arteries to these parts are preserved. With this option you can create a well ...
The coronary arteries help fulfill this function. All muscles are derived from paraxial mesoderm. The paraxial mesoderm is ... the ciliary muscle, and iris of the eye. The structure and function is basically the same in smooth muscle cells in different ... and small arteries, arterioles and veins. Smooth muscle is also found in lymphatic vessels, the urinary bladder, uterus (termed ...
They may also decrease tubal motility and ciliary action. Progestogens are used in combination with estrogens in menopausal ... while PE occurs when a clot breaks free and blocks an artery in the lungs. VTE is a rare but potentially fatal cardiovascular ...
However, the opposite is true in the coronary arteries, where β2 response is greater than that of α1, resulting in overall ... blood vessels of ciliary body and (stimulation of dilator pupillae muscles of iris causes mydriasis) Actions also include ... It causes vasoconstriction in many blood vessels, including those of the skin, gastrointestinal system, kidney (renal artery) ... decrease the output of sinus node thus stabilizing heart function coronary artery disease - reduce heart rate and hence ...
Nitric oxide synthase
eNOS plays a critical role in embryonic heart development and morphogenesis of coronary arteries and cardiac valves. The ... It has been suggested that pathologic generation of nitric oxide through increased iNOS production may decrease tubal ciliary ... identical to the endothelium-derived relaxing factor produced in response to shear from increased blood flow in arteries. This ...
The shape of the lens can be altered by ciliary muscles which are directly attached to the lens capsule by means of the zonular ... The choroid is a layer situated behind the retina which contains many small arteries and veins. These provide arterial blood to ... with ciliary muscles that can change the shape of the lens rapidly and to a greater extent than in the mammals.[citation needed ...
Capillary lamina of choroid
The choriocapillaris is unique to the choroid and does not continue into the ciliary body. ImranBhutto,GerardLutty (1967-09-01 ... and the larger caliber arteries and veins that lie just posterior to the choriocapillaris (these can easily be seen in an ...
Source of bleeding in hyphema with blunt trauma to eye is circulus iridis major artery. The main goals of ... Disorders of iris and ciliary body). ...
Effect of acute intraocular pressure changes on short posterior ciliary artery haemodynamics | British Journal of Ophthalmology
Since the anterior optic nerve is supplied largely by the short posterior ciliary arteries,1 22 the purpose of this study was ... CDI of the short posterior ciliary arteries and measurement of the IOPs occurred within 3 minutes of each IOP elevation. The ... It is widely accepted that the short posterior ciliary arteries represent the main source of blood for the anterior optic nerve ... The haemodynamic properties of the short posterior ciliary arteries in response to elevated IOP do not imply the presence of ...
Airway-artery quantitative assessment on chest computed tomography in paediatric primary ciliary dyskinesia | European...
Airway-artery quantitative assessment on chest computed tomography in paediatric primary ciliary dyskinesia. Valentina Ferraro ... Box plots of a) inner airway diameter, b) outer airway diameter, c) wall thickness and d) artery diameter of primary ciliary ... Box plots of airway-artery ratio of primary ciliary dyskinesia (PCD) and control patients, divided according to different lung ... Airway-artery quantitative assessment on chest computed tomography in paediatric primary ciliary dyskinesia ...
Giant Cell Arteritis (Temporal Arteritis) Workup: Approach Considerations, Temporal Artery Biopsy, Ultrasonography
141] Occlusion of the posterior ciliary arteries occurs more commonly. Involvement of intracranial arteries is rare, and ... Temporal Artery Biopsy. Superficial temporal artery biopsy (TAB) is the criterion standard for making a diagnosis of temporal ... Temporal artery ultrasound (US), with or without axillary artery US, is recommended as the first imaging modality in patients ... In GCA, vertebral arteries are more likely affected than internal carotid arteries, especially in the extradural portion, where ...
Ocular Cysticercosis Clinical Presentation: History, Physical, Causes
14] The site of entry into the eye is the posterior ciliary arteries, from which the cyst migrates into the subretinal space, ... 20] The cyst may enter the anterior chamber either from the posterior ciliary arteries or from the angle. Intraocular ... 15] Other sites of entry include the ciliary and retinal blood vessels. Within the vitreous cavity, the cyst may be free- ...
Find Research outputs - the UWA Profiles and Research Repository
கதிராளி - தமிழ் விக்கிப்பீடியா
PDF) Definition of the Ocular Surface
derived from the anterior ciliary and the palpebral artery branches. The palpebral arteries also supply the eyelids and ... supplied by the lacrimal artery derived from the ophthalmic artery, with veins draining to the superior ophthalmic vein (Snell ... ciliary nerves, which are from the ophthalmic and maxillary division of the ...
Orbit Anatomy: Osteology, Lacrimal System, Connective Tissue Planes
... ciliary arteries, and collateral branches to the optic nerve. The orbital branches are the lacrimal artery, muscular arteries, ... supraorbital artery, medial palpebral artery, dorsal nasal artery, and supratrochlear artery. ... The medial palpebral artery is supplied by a combination of the dorsal nasal artery and the angular artery, which comes from ... Infraorbital artery. The infraorbital artery is a branch of the external carotid system via the internal maxillary artery. The ...
Turkish Journal of Veterinary & Animal Sciences | Vol 27 | No. 5
Main Page/SlicerCommunity/2022 - Slicer Wiki
We assess whether a choroidal macrovessel is a dilated posterior ciliary artery. A systematic review of published literature on ... "Using the segment editor module in 3D Slicer, the high intensity pixels (representing primarily the artery wall) were segmented ... Abstract: We present a patient with severe tracheal stenosis resulting from a compression by the innominate artery 6 months ... two cases showed a radiating course along a sectoral distribution pattern of either short or long posterior ciliary arteries. ...
Two-Dimensional and Duplex Doppler Ultrasonography of the Eye in Normal Rabbits - WSAVA2002 - VIN
By color Doppler imaging ciliary arteries and veins, external ophthalmic artery and dorsal external ophthalmic vein were easily ... were obtained in external ophthalmic artery and ciliary arteries. ... In ciliary arteries the results were the following: peak systolic velocity, 17.33±4.00 cm/sc; end diastolic velocity, 11.43± ... Mean and standard deviation were the following in external ophthalmic artery: peak systolic velocity, 30.50±7.75 cm/sc; end ...
Different Filling Patterns of the Choriocapillaris in Fluorescein and Indocyanine Green Angiography in Primate Eyes Under...
Siegrist Streaks and Elschnig Spots - EyeWiki
Accelerated hypertension and/or ophthalmic ciliary artery occlusion (from GCA or other vasculitides) can lead to choroidal ... the central retinal artery and the outer choroid and retina being supplied by the long and short posterior ciliary arteries.[14 ... The posterior ciliary artery also serves as the main arterial blood supply of the choroid. The choroidal bed also differs from ... and it receives blood flow from the short and long posterior ciliary arteries. ...
Flashcards - OAP T2
What arteries supply blood to the bulbar conjunctiva The anterior ciliary arteries ... The lacrimal artery, derived from the ophthalmic artery supplies the lacrimal gland.*Venous blood returns via the superior ... The medial palpebral artery (superior and inferior) and the Lateral Palpebral Artery. ... What arteries anastomose to supply blood to the eyelids by the peripheral arcades? ...
Find Research outputs - Yonsei University
Apraclonidine: Uses, Interactions, Mechanism of Action | DrugBank Online
2020-2021 BCSC Basic and Clinical Science Course™
... which also receives some blood from the long posterior ciliary artery. Therefore, simultaneous surgery on 3 rectus muscles may ... Because parasympathetic fibers to the sphincter pupillae (for pupil constriction) and the ciliary muscle (for accommodation) ... accompany the nerve to the inferior oblique muscle, with a synapse in the ciliary ganglion, surgery in this area may also ...
Cunningham's textbook of anatomy - Daniel John Cunningham - Google Livres
The sclera receives its blood-supply from the short posterior ciliary and the anterior ciliary arteries, while its veins open ... The arteries of the chorioid are derived from the short posterior ciliary vessels which pierce the sclera around the entrance ... The two long posterior ciliary arteries pierce it, one on each side, some little distance from the entrance of the optic nerve ... Circular fibres of ciliary muscle. in the deeper part of this Parts of ciliary processes junction there is a circular canal, ...
Ciliary Arteries - Preferred Concept UI. M0029452. Scope note. Three groups of arteries found in the eye which supply the iris ... Three groups of arteries found in the eye which supply the iris, pupil, sclera, conjunctiva, and the muscles of the iris.. ... Arteries, Ciliary. Artery, Ciliary. Ciliary Artery. Tree number(s):. A07.015.114.248. RDF Unique Identifier:. https://id.nlm. ...
Code System Concept
Structure of anterior ciliary artery (body structure). Code System Preferred Concept Name. Structure of anterior ciliary artery ... Anterior ciliary artery Active Synonym false false 506268019 Structure of anterior ciliary artery Active Synonym false false ... Anterior ciliary arteries Active Synonym false false 201171010 ...
Diffuse siliconoma of the eyelid - Canadian Journal of Ophthalmology
Posterior ciliary-artery occlusion after subcutaneous silicone-oil injection.. Ann Ophthalmol. 1988; 20: 342-344. View in ... Posterior ciliary-artery occlusion after subcutaneous silicone-oil injection.. Ann Ophthalmol. 1988; 20: 342-344 ... posterior ciliary artery occlusion; epiretinal membranes; and episcleral, subconjunctival, and orbital foreign body granulomas. ...
... The ciliary body is a part of the eye that includes the ciliary muscle, which controls the shape of the lens, and ... Artery. long posterior ciliary arteries. Identifiers. Latin. corpus ciliare. MeSH. D002924. TA. A15.2.03.009. ... and travel through the ciliary ganglion. Postsynaptic fibers from the ciliary ganglion form the short ciliary nerves. ... The vitreous humor is produced in the non-pigmented portion of the ciliary body. The ciliary body is part of the uvea, the ...
Cunningham's textbook of anatomy - Daniel John Cunningham - Google Livres
The sclera receives its blood-supply from the short posterior ciliary and the anterior ciliary arteries, while its veins open ... The arteries of the chorioid are derived from the short posterior ciliary vessels which pierce the sclera around the entrance ... The two long posterior ciliary arteries pierce it, one on each side, some little distance from the entrance of the optic nerve ... Circular fibres of ciliary muscle. in the deeper part of this Parts of ciliary processes junction there is a circular canal, ...
Giant Cell Arteritis (Temporal Arteritis): Practice Essentials, Pathophysiology, Etiology
In addition, GCA most commonly affects the ophthalmic, occipital, vertebral, posterior ciliary, and proximal vertebral arteries ... Vertebral arteries are involved as frequently as the superficial temporal arteries in fatal cases, although basilar artery ... Common signs and symptoms of GCA reflect the involvement of the temporal artery and other medium-sized arteries of the head and ... Intraorbital branches, especially the posterior ciliary and ophthalmic arteries, are commonly affected ...
Imaging of Pediatric Orbital Diseases | Radiology Key
The intraconal space contains fat, the ciliary ganglion, the ophthalmic artery and vein, and branches of the ophthalmic nerve. ... The ophthalmic artery and vein and cranial nerves enter the intraconal space through the annulus of Zinn. The extraconal space ... The choroid is continuous anteriorly with the iris and ciliary body, and together, these structures make up the uvea. The lens ... The uvea consists of the iris, ciliary body, and choroid (the most vascular structure of the globe). The retina continues ...
A review of specialties performing temporal artery biopsies in Ontario: a retrospective cohort study | CMAJ Open
Typically, it involves the branches of the external carotid artery and the vertebral, ophthalmic and posterior ciliary arteries ... Temporal artery biopsy: skip it at your patients peril. Am J Ophthalmol 2012;154:617-9.e1.pmid:22995557. ... Background Temporal artery biopsy is the gold standard for the diagnosis of giant cell arteritis, but the numbers and types of ... of temporal artery biopsies (TABs) performed in Ontario per specialist per year and mean no. of physicians performing at least ...
Pesquisa | Portal Regional da BVS
Simultaneously, flow velocities in the CRA and posterior ciliary artery (PCA) were compared with the ICP. RESULTS: The ONSDE, ... This implies some potential small artery remodeling in the intraretinal CRA branches. Overall, blood supply of the inner retina ... Additionally, studies on the prediction of ICP using central retinal artery (CRA) Doppler ultrasonography are scarce. The ... Optic Nerve Sheath Diameter Detects Intracranial Hypertension in Acute Malignant Middle Cerebral Artery Infarction. ...
Офтальмол. журн. - 2022. - № 3. - С. 10-17. | Офтальмологічний журнал
Volume 16(10) 2010 (24)
Assessment of blood flow in posterior ciliary arteries and its correlation with intraocular and arterial blood pressures in ... Assessment of blood flow in posterior ciliary arteries and its correlation with intraocular and arterial blood pressures in ... Iliac artery in-stent restenosis evaluation in 64-row CT Wojciech Poncyljusz, Aleksander Falkowski, [...] Marcin Sawicki, ... Iliac artery in-stent restenosis evaluation in 64-row CT Wojciech Poncyljusz, Aleksander Falkowski, Marcin Sawicki, Monika Rać ...
Ophthalmic arteryPosterior ciliary artery occlusionGanglionOcclusionPerfused by the short posterioPortion of the ciliary bodySUBCLAVIAN ARTERYExternal carotiPrimary ciliary dyChoroidRetinalVeinsVertebral arteriesIrisInferiorDopplerVesselsCarotid ArteriesLateralNasalMedialBiopsyGiant Cell ArteBranchTemporal arteritisInflammationNervesMeshOptic nerveGlaucomaBodyUltrasonographySymptomsEpitheliumOrbitalVitreousAirwayShortAnterior chamberLongCerebralAortaBloodPatientsSurgical
- In contrast, ophthalmic artery flow velocities were found to be unaffected by acute IOP changes. (bmj.com)
- By duplex Doppler ultrasonography ocular and orbital vessels were identify and blood flow measurements, including peak systolic velocity, end diastolic velocity, pulsatility index and resistive index, were obtained in external ophthalmic artery and ciliary arteries. (vin.com)
- By color Doppler imaging ciliary arteries and veins, external ophthalmic artery and dorsal external ophthalmic vein were easily identified. (vin.com)
- The retina receives dual blood supply from the branches of the ophthalmic artery, with the inner retina being supplied from the central retinal artery and the outer choroid and retina being supplied by the long and short posterior ciliary arteries. (aao.org)
- The intraconal space contains fat, the ciliary ganglion, the ophthalmic artery and vein, and branches of the ophthalmic nerve. (radiologykey.com)
- The ophthalmic artery and vein and cranial nerves enter the intraconal space through the annulus of Zinn. (radiologykey.com)
- There are two circulations to the retina, both supplied by the ophthalmic artery, the first branch of the internal carotid artery on each side. (medscape.com)
- The inner retina is supplied by the central retinal artery, the branch of the ophthalmic artery that enters the optic nerve 4 mm posterior to the eye. (medscape.com)
- Purpose: To evaluate preliminarily and compare the level of plasmatic biomarkers of vascular risk in patients with and without exudative age-related macular degeneration (ARMD) and to relate it to vascular resistance alterations in the ophthalmic artery (OA), central retinal artery (CRA), posterior temporal ciliary artery (PTCA), and posterior nasal ciliary artery (PNCA). (who.int)
Posterior ciliary artery occlusion2
- Posterior ciliary-artery occlusion after subcutaneous silicone-oil injection. (canadianjournalofophthalmology.ca)
- Heal Pharmacy is a major online pharmacy that offers intensely reduce posterior ciliary artery occlusion results ADDA members by telephone. (kyrocream.com)
- Because parasympathetic fibers to the sphincter pupillae (for pupil constriction) and the ciliary muscle (for accommodation) accompany the nerve to the inferior oblique muscle, with a synapse in the ciliary ganglion, surgery in this area may also result in an enlarged pupil. (aao.org)
- Ciliary ganglion with parasympathetic fibers of ciliary nerves. (iiab.me)
- Presynaptic parasympathetic signals that originate in the Edinger-Westphal nucleus are carried by cranial nerve III (the oculomotor nerve ) and travel through the ciliary ganglion . (iiab.me)
- Postsynaptic fibers from the ciliary ganglion form the short ciliary nerves. (iiab.me)
- It also supplies the ciliary and sphincter pupillae muscles through the ciliary ganglion. (neurosurgicalatlas.com)
- Lis* the openings of his right foot, generally tak^n the ciliary ganglion and subclavian trunk. (markhampodiatry.com)
- Accelerated hypertension and/or ophthalmic ciliary artery occlusion (from GCA or other vasculitides) can lead to choroidal ischemia and thus hypertensive choroidopathy. (aao.org)
Perfused by the short posterio1
- The anterior optic nerve is primarily perfused by the short posterior ciliary arteries. (bmj.com)
Portion of the ciliary body2
- The vitreous humor is produced in the non-pigmented portion of the ciliary body. (iiab.me)
- 35] A cyclectomy is an excision of portion of the ciliary body. (docbeltran.com)
- This graph shows the total number of publications written about "Subclavian Artery" by people in this website by year, and whether "Subclavian Artery" was a major or minor topic of these publications. (uchicago.edu)
- Below are the most recent publications written about "Subclavian Artery" by people in Profiles. (uchicago.edu)
- Nicholson JA, Stirling PHC, Strelzow J, Robinson CM. Dynamic Compression of the Subclavian Artery Secondary to Clavicle Nonunion: A Report of 2 Cases. (uchicago.edu)
- Russo MJ, Jeevanandam V, Hur MJ, Johnson EM, Siffring T, Shah AP, Raman J. Prophylactic Subclavian Artery Intraaortic Balloon Counter-Pulsation is Safe in High-Risk Cardiac Surgery Patients. (uchicago.edu)
- Typically, it involves the branches of the external carotid artery and the vertebral, ophthalmic and posterior ciliary arteries. (cmajopen.ca)
- It thighs abandon the impulses of the external carotid artery needle sheathed in proportionate ratio. (markhampodiatry.com)
- each divides into two branches, the internal carotid artery and the external carotid artery. (nih.gov)
- A branch of the external carotid artery which distributes to the deep structures of the face (internal maxillary) and to the side of the face and nose (external maxillary). (childrensmercy.org)
Primary ciliary dy3
- Chest computed tomography (CT) is the gold standard for detecting structural abnormalities in patients with primary ciliary dyskinesia (PCD) such as bronchiectasis, bronchial wall thickening and mucus plugging. (ersjournals.com)
- Primary ciliary dyskinesia (PCD) is a genetic disorder characterised by absent cilia or impaired ciliary function [ 1 , 2 ] leading to an impaired mucociliary clearance in upper and lower airways [ 3 , 4 ]. (ersjournals.com)
- Laterality Defects in Primary Ciliary Dyskinesia: Relationship to Ultrastructural Defect or Genotype. (cdc.gov)
- The posterior choroid is supplied by the short posterior ciliary arteries (SPCAs) that arise from the peripapillary area. (arvojournals.org)
-  The posterior ciliary artery also serves as the main arterial blood supply of the choroid. (aao.org)
- The choroid is the layer between the RPE and sclera, and it receives blood flow from the short and long posterior ciliary arteries. (aao.org)
- The ciliary body joins the ora serrata of the choroid to the root of the iris . (iiab.me)
- The middle layer consists of the uveal tract made up of the choroid posteriorly and the ciliary body and iris anteriorly. (medscape.com)
- Uveitis is an inflammatory eye disease affecting the iris, ciliary body, and choroid that can lead to symptoms ranging from redness, pain, and blurred vision to markedly diminished acuity in the setting of severe or chronic disease. (touchophthalmology.com)
- 9-15 An increase in mean and end diastolic velocity and a decrease in resistance index have been noted in the central retinal and short posterior ciliary arteries of glaucoma patients after trabeculectomy. (bmj.com)
- Colour Doppler imaging has recently been used to demonstrate the highly dependent relation between central retinal artery haemodynamics and acute changes in IOP. (bmj.com)
- 21 Acute incremental elevation of IOP in healthy human subjects resulted in a progressive drop in central retinal artery blood flow velocities implying a close link among mechanical and haemodynamic factors in this particular vascular bed. (bmj.com)
- [ 15 ] Other sites of entry include the ciliary and retinal blood vessels. (medscape.com)
- The outer and middle retinal layers, including the outer plexiform and outer nuclear layers, the photoreceptors, and the retinal pigment epithelium, are nourished by branches of the posterior ciliary arteries, which enter the back of the eye outside the optic nerve. (medscape.com)
- The central retinal artery has 4 main branches within the retina. (medscape.com)
- ASI is a rare but well-documented complication of certain ocular surgeries, mostly after strabismus  or retinal detachment surgeries,  mainly due to extraocular muscle manipulation and interruption of anterior ciliary arteries. (ojoonline.org)
- 2. A circle formed by connecting arteries, veins, or nerves. (en-academic.com)
- Instrument to measure the heat convection coefficient on the endothelial surface of arteries and veins. (musc.edu)
- Spontaneous dissection of bilateral internal carotid and vertebral arteries. (harvard.edu)
- Tres grupos de arterias que se encuentran en el ojo, las cuales irrigan el iris, la pupila, la esclera, la conjuntiva y los músculos del iris. (bvsalud.org)
- Three groups of arteries found in the eye which supply the iris, pupil, sclera, conjunctiva, and the muscles of the iris. (bvsalud.org)
- 14] A corectomedialysis, or coretomedialysis, is an excision of a small portion of the iris at its junction with the ciliary body to form a artificial pupil. (docbeltran.com)
- 14] An iridodialysis, sometimes known as a coredialysis, is a localized separation or tearing away of the iris from its attachment to the ciliary body. (docbeltran.com)
- 14] An iridocyclectomy is the surgical removal of the iris and the ciliary body. (docbeltran.com)
- The collateral blood flow exists at three levels: the episclera, the ciliary muscle, and the root of the iris. (ojoonline.org)
- 2 Anterior uveitis primarily affects the iris, ciliary body, cornea, or sclera, and usually has a non-infectious-and often idiopathic-etiology. (touchophthalmology.com)
- The infraorbital sulcus crosses the floor of the orbit and carries the infraorbital artery, infraorbital vein, and infraorbital nerve from the inferior orbital fissure to the infraorbital foramen. (medscape.com)
- METHODS Colour Doppler imaging was performed on the short posterior ciliary arteries of 10 normal subjects at baseline and during four incremental IOP elevations. (bmj.com)
- The exact mechanism of action is unknown, but fluorophotometric studies in animals and humans suggest that Apraclonidine has a dual mechanism of action by reducing aqueous humor production through the constriction of afferent ciliary process vessels, and increasing uveoscleral outflow. (drugbank.com)
- It contains the ciliary muscle , vessels, and fibrous connective tissue. (iiab.me)
- Medium- and large-sized vessels that may be involved include the aorta and the carotid, subclavian, and iliac arteries. (medscape.com)
- Giant Cell Arteritis Giant cell arteritis involves predominantly the thoracic aorta, large arteries emerging from the aorta in the neck, and extracranial branches of the carotid arteries. (merckmanuals.com)
- It supplies all the extraocular muscles except the superior oblique and lateral rectus and also innervates the sphincter pupillae and ciliary muscles. (neurosurgicalatlas.com)
- The blood supply to the EOMs provides almost all of the temporal half of the anterior segment circulation and most of the nasal half of the anterior segment circulation, which also receives some blood from the long posterior ciliary artery. (aao.org)
- It as it approaches the nasal arteries, etc. (starrluxurycars.com)
- The ethmoid arteries mark the superior limit for osteotomies during medial maxillectomy. (medscape.com)
- [ 96 ] Additionally, in the largest population-based GCA study to date in the United States (3001 patients), the combination of elevated platelet counts and CRP levels greater than 2.45 mg/dL was associated with a positive temporal artery biopsy, while ESR results were not as specific a predictor. (medscape.com)
- Superficial temporal artery biopsy (TAB) is the criterion standard for diagnosing temporal arteritis. (medscape.com)
- Temporal artery biopsy remains the criterion standard for diagnosis of this granulomatous vasculitis (see the image below). (medscape.com)
- Hematoxylin- and eosin-stained superficial temporal artery biopsy specimen, cross section. (medscape.com)
- Background Temporal artery biopsy is the gold standard for the diagnosis of giant cell arteritis, but the numbers and types of surgical specialists performing temporal artery biopsies are unknown. (cmajopen.ca)
- Results A total of 9958 patients underwent a temporal artery biopsy during the study period: the biopsies were performed by 11 different subspecialties. (cmajopen.ca)
- The number of patients undergoing a temporal artery biopsy declined over the 10-year study period. (cmajopen.ca)
- Ophthalmologists performed more temporal artery biopsies per person compared with general surgeons, but significantly more general surgeons performed at least 1 biopsy. (cmajopen.ca)
- Biopsy of the temporal artery is considered the gold standard in the diagnosis of giant cell arteritis, because it provides clinicians with the rationale to use high-dose corticosteroids for prolonged periods of time and avoids unnecessary treatment in patients who do not actually have the disease. (cmajopen.ca)
- 1 Generally, patients are referred to a surgical specialist for a temporal artery biopsy, but the frequency with which different specialties perform temporal artery biopsies is unknown. (cmajopen.ca)
- Although it is a generally safe procedure, temporal artery biopsy still carries a small risk of complications including scalp necrosis, 2 facial nerve injury 3 , 4 and stroke, 5 and proper training and procedure volume during residency are important to avoid unnecessary complications in practice. (cmajopen.ca)
Giant Cell Arte1
- This study assessed the diagnostic accuracy of 3D high-resolution T1-weighted black-blood magnetic resonance imaging (T1-BB-MRI) for the detection of posterior ciliary artery involvement in patients with giant cell arteritis and funduscopic arteritic anterior ischemic optic neuropathy (A-AION). (saratoga-ophthalmology.com)
- All visible airway-artery (AA) pairs were measured perpendicular to the airway centre line, annotating per branch inner and outer airway and adjacent artery diameter and computing inner airway diameter/artery ratio (AinA ratio), outer airway diameter/artery ratio (AoutA ratio), wall thickness (WT), WT/outer airway diameter ratio (Awt ratio) and WT/artery ratio. (ersjournals.com)
- [ 3 ] but typically also involves medium and small arteries, particularly the superficial temporal arteries-hence the term temporal arteritis. (medscape.com)
- Histopathologically, GCA is marked by transmural inflammation of the intima, media, and adventitia of affected arteries, as well as patchy infiltration by lymphocytes, macrophages, and multinucleated giant cells. (medscape.com)
- The mechanism of optic neuropathy is most probably acute ischemic changes of the anterior optic nerve due to direct involvement of the short posterior ciliary arteries by inflammation of the vessel wall [ 2 ]. (ekjo.org)
- The ciliary body is also known to receive sympathetic innervation via long ciliary nerves. (iiab.me)
- and short ciliary nerves. (lecturio.com)
- In the supinator longus colli artery forms the base of the principal vein, as to the nerves. (starrluxurycars.com)
- 14] A ciliotomy is a surgical section of the ciliary nerves. (docbeltran.com)
- Vertebral Artery" is a descriptor in the National Library of Medicine's controlled vocabulary thesaurus, MeSH (Medical Subject Headings) . (harvard.edu)
- Since the anterior optic nerve is supplied largely by the short posterior ciliary arteries, 1 22 the purpose of this study was to determine the relation between short posterior ciliary artery haemodynamics and acute changes in IOP. (bmj.com)
- You should leave some episcleral tissue around the optic nerve at its entrance since the short posterior ciliary arteries enter here and may be important in the diagnosis of vascular disease. (medrounds.org)
- Because the ciliary body produces aqueous humor, it is the main target of many medications against glaucoma . (iiab.me)
- A ciliarotomy is a surgical division of the ciliary zone in the treatment of glaucoma. (docbeltran.com)
- 14] A cyclotomy, or cyclicotomy, is a surgical incision of the ciliary body, usually for the relief of glaucoma. (docbeltran.com)
- 14] A cycloanemization is a surgical obliteration of the long ciliary arteries in the treatment of glaucoma. (docbeltran.com)
- The ciliary body is a part of the eye that includes the ciliary muscle , which controls the shape of the lens, and the ciliary epithelium, which produces the aqueous humor . (iiab.me)
-  The ciliary body is part of the uvea , the layer of tissue that delivers oxygen and nutrients to the eye tissues. (iiab.me)
- Anterior part of the human eye , with ciliary body near bottom. (iiab.me)
- The ciliary body is a ring-shaped thickening of tissue inside the eye that divides the posterior chamber from the vitreous body . (iiab.me)
- The ciliary body is attached to the lens by connective tissue called the zonular fibers (fibers of Zinn). (iiab.me)
- The parasympathetic innervation of the ciliary body is the most clearly understood. (iiab.me)
- 14] A ciliectomy is 1) the surgical removal of part of the ciliary body, or 2) the surgical removal of part of a margin of an eyelid containing the roots of the eyelashes. (docbeltran.com)
- The ciliary body produces aqueous humor, a fluid that nourishes parts of the eye. (drmonicanguyen.com)
- Color duplex ultrasonography of the temporal artery has emerged as a promising alternative or complement to TAB. (medscape.com)
- Common signs and symptoms of GCA reflect the involvement of the temporal artery and other medium-sized arteries of the head and the neck and include visual disturbances, headache, jaw claudication, neck pain, and scalp tenderness. (medscape.com)
- Airway ciliary dysfunction and respiratory symptoms in patients with transposition of the great arteries. (cdc.gov)
- Hepatic artery embolization for control of symptoms, octreotide requirements, and tumor progression in metastatic carcinoid tumors. (musc.edu)
- Folds on the inner ciliary epithelium are called ciliary processes , and these secrete aqueous humor into the posterior chamber. (iiab.me)
- The ciliary epithelium of the ciliary processes produces aqueous humor , which is responsible for providing oxygen, nutrients, and metabolic waste removal to the lens and the cornea , which do not have their own blood supply. (iiab.me)
- The distance from the orbital rim to the anterior ethmoid artery is approximately 20-25 mm. (medscape.com)
- [ 14 ] The site of entry into the eye is the posterior ciliary arteries, from which the cyst migrates into the subretinal space, bores a hole in the retina, and enters the vitreous cavity. (medscape.com)
- There are no studies on quantitative assessment of airway and artery abnormalities in children with PCD. (ersjournals.com)
- The objectives of the present study were to quantify airway and artery dimensions on chest CT in a cohort of children with PCD and compare these with control children to analyse the influence of covariates on airway and artery dimensions. (ersjournals.com)
- In general, an airway-artery (AA) ratio larger than 1 is classified as bronchiectasis [ 20 ]. (ersjournals.com)
- This was studied by using scleral suction to acutely alter IOP in healthy eyes and monitoring the short posterior ciliary arteries with non-invasive CDI. (bmj.com)
- [ 20 ] The cyst may enter the anterior chamber either from the posterior ciliary arteries or from the angle. (medscape.com)
-  The anterior uveal circulation is a highly complex network that interconnects both the anterior and long posterior ciliary arterial systems. (ojoonline.org)
- Chen R, Anyanwu B, Feng W. Hepatic artery vasoconstriction associated with reversible cerebral vasoconstriction syndrome. (musc.edu)
- Artery arising from the brachiocephalic trunk on the right side and from the arch of the aorta on the left side. (uchicago.edu)
- Blood flow could not be detected in up to three arteries in the affected (ipsilateral) orbit of 6 GCA patients at presentation. (qxmd.com)
- Five of these patients were also found to have undetectable blood flow in the posterior ciliary arteries of the contralateral orbit. (qxmd.com)
- By contrast, only 1 of the patients with non-arteritic AION showed undetectable blood flow in a posterior ciliary artery. (qxmd.com)
- The anterior and posterior ethmoid arteries pass through these foramina and are important surgical landmarks. (medscape.com)
- The goal of this study was to determine which surgical specialists performed temporal artery biopsies and how geographic location influenced this trend over a period of 10 years. (cmajopen.ca)
- The goal of the current study was to determine which surgical specialists perform temporal artery biopsies and how this has evolved over a 10-year period. (cmajopen.ca)