Three groups of arteries found in the eye which supply the iris, pupil, sclera, conjunctiva, and the muscles of the iris.
Artery originating from the internal carotid artery and distributing to the eye, orbit and adjacent facial structures.
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.
A ring of tissue extending from the scleral spur to the ora serrata of the RETINA. It consists of the uveal portion and the epithelial portion. The ciliary muscle is in the uveal portion and the ciliary processes are in the epithelial portion.
The vessels carrying blood away from the heart.
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.
The L-Isomer of bunolol.
A direct acting sympathomimetic used as a vasoconstrictor to relieve nasal congestion. (From Martindale, The Extra Pharmacopoeia, 30th ed, p1251)
The recording of muscular movements. The apparatus is called a myograph, the record or tracing, a myogram. (From Stedman, 25th ed)
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.
Central retinal vein and its tributaries. It runs a short course within the optic nerve and then leaves and empties into the superior ophthalmic vein or cavernous sinus.
The thin, highly vascular membrane covering most of the posterior of the eye between the RETINA and SCLERA.
The organ of sight constituting a pair of globular organs made up of a three-layered roughly spherical structure specialized for receiving and responding to light.
Drugs that bind to and activate adrenergic receptors.
The short wide vessel arising from the conus arteriosus of the right ventricle and conveying unaerated blood to the lungs.
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.
Either of the two principal arteries on both sides of the neck that supply blood to the head and neck; each divides into two branches, the internal carotid artery and the external carotid artery.
The nonstriated involuntary muscle tissue of blood vessels.
The arterial blood vessels supplying the CEREBRUM.
A branch of the abdominal aorta which supplies the kidneys, adrenal glands and ureters.
The main artery of the thigh, a continuation of the external iliac artery.
A stable prostaglandin endoperoxide analog which serves as a thromboxane mimetic. Its actions include mimicking the hydro-osmotic effect of VASOPRESSIN and activation of TYPE C PHOSPHOLIPASES. (From J Pharmacol Exp Ther 1983;224(1): 108-117; Biochem J 1984;222(1):103-110)
A value equal to the total volume flow divided by the cross-sectional area of the vascular bed.
Muscular contractions characterized by increase in tension without change in length.
Drugs used to cause constriction of the blood vessels.
Arteries which arise from the abdominal aorta and distribute to most of the intestines.
The physiological widening of BLOOD VESSELS by relaxing the underlying VASCULAR SMOOTH MUSCLE.
The artery formed by the union of the right and left vertebral arteries; it runs from the lower to the upper border of the pons, where it bifurcates into the two posterior cerebral arteries.
The flow of BLOOD through or around an organ or region of the body.
That phase of a muscle twitch during which a muscle returns to a resting position.
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).
The pressure of the fluids in the eye.
Either of two large arteries originating from the abdominal aorta; they supply blood to the pelvis, abdominal wall and legs.
The first branch of the SUBCLAVIAN ARTERY with distribution to muscles of the NECK; VERTEBRAE; SPINAL CORD; CEREBELLUM; and interior of the CEREBRUM.
Surgical therapy of ischemic coronary artery disease achieved by grafting a section of saphenous vein, internal mammary artery, or other substitute between the aorta and the obstructed coronary artery distal to the obstructive lesion.
Visualization of a vascular system after intravenous injection of a fluorescein solution. The images may be photographed or televised. It is used especially in studying the retinal and uveal vasculature.
Single pavement layer of cells which line the luminal surface of the entire vascular system and regulate the transport of macromolecules and blood components.
The direct continuation of the brachial trunk, originating at the bifurcation of the brachial artery opposite the neck of the radius. Its branches may be divided into three groups corresponding to the three regions in which the vessel is situated, the forearm, wrist, and hand.
Arteries originating from the subclavian or axillary arteries and distributing to the anterior thoracic wall, mediastinal structures, diaphragm, pectoral muscles and mammary gland.
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.
Branch of the common carotid artery which supplies the anterior part of the brain, the eye and its appendages, the forehead and nose.
Artery arising from the brachiocephalic trunk on the right side and from the arch of the aorta on the left side. It distributes to the neck, thoracic wall, spinal cord, brain, meninges, and upper limb.
Pathological conditions involving the CAROTID ARTERIES, including the common, internal, and external carotid arteries. ATHEROSCLEROSIS and TRAUMA are relatively frequent causes of carotid artery pathology.

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)

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 aka Arteriae ciliares posteriores breves in the latin terminology and part of arteries and veins of the eye. Learn more now!
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.
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 ...
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.. ...
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 ...
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
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 ...
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 ...
The present findings suggest that alterations in ocular blood flow regulation may contribute to the progression in glaucomatous damage.
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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 ...
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 ...
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, ...
Definition of anterior ciliary arteries. Provided by Stedmans medical dictionary and Drugs.com. Includes medical terms and definitions.
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
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
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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 ...
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 ...
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…. ...
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). ...
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 ...
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 ...
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. ...
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...
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 ...
Background. To compare retrobulbar blood flow in patients with central serous chorioretinopathy (CSC) and healthy subjects using color Doppler ultrasonography. ...
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 ...
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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 ...
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 ...
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.
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 ...
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 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. ...
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 ...
Abstract Background  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. Methods  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 (n = 23), group 2â€patients without DR and with hypertension (n = 21), group 3â€patients with nonproliferative DR and without hypertension (n = 36), group 4â€patients with nonproliferative DR and with hypertension (n = 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 ...
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 ...
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.. ...
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 ...
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). ...
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 ...
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
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 ...
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 ...
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 [19]. This therapeutic window is also supported by animal models [25] as well as the common clinical experience of general progression in visual loss during this period, with stabilization thereafter [3]. For this reason the IONDT [4] 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 ...
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.. ...
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 …
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Ophthalmic artery, 33. Artery and central retinal vein → 36. Blood vessels of the retina; Ciliary arteries (34. Short posterior ... Ciliary body (with a: pars plicata and b: pars plana) and 16. Choroid); 17. Ora serrata, 18. Vitreous humor with 19. Hyaloid ... Lacrimal artery, 39. Ophthalmic vein, 40. Vorticose vein.. 41. Ethmoid bone, 42. Medial rectus muscle, 43. Lateral rectus ... 1. Lens, 2. Zonule of Zinn or Ciliary zonule, 3. Posterior chamber and 4. Anterior chamber with 5. Aqueous humour flow; 6. ...
Short posterior ciliary arteries. *Anterior ciliary artery. *Central retinal artery. *Muscular artery ... internal carotid artery[edit]. *ophthalmic artery *Orbital group *Lacrimal artery *lateral palpebral arteries ... common hepatic artery *proper hepatic artery *Terminal branches *right hepatic artery *Cystic artery ... posterior tibial artery *fibular artery (sometimes from popliteal artery) *communicating branch to the anterior tibial artery ...
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 ...
Artery. long posterior ciliary arteries. Nerve. long ciliary nerves, short ciliary nerves. ...
long posterior ciliary arteries. عصب محیطی. short ciliary nerves. حرکات. constricts مردمک. ...
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 ...
Short posterior ciliary arteries. *Anterior ciliary artery. *Central retinal artery. *Muscular artery ... deep artery of the penis ♂ (Helicine arteries of penis)/Deep artery of clitoris ♀ • Dorsal artery of the penis ♂/Dorsal artery ... Colic branch of ileocolic artery, Anterior cecal artery, posterior cecal, Ileal branch of ileocolic artery, Appendicular artery ... Gastroduodenal artery (Right gastro-omental artery, Superior pancreaticoduodenal artery, Supraduodenal artery) ...
Larvae are thought to enter the eye through the optic nerve, central retinal artery, short posterior ciliary arteries, soft ...
Suprachoroidal hemorrhage - rupture of long posterior ciliary artery from progressive stretching with progressive serous ... into a cyclodialysis cleft between the ciliary body and the sclera if tissue is dissected posterior to the scleral spur. ...
... ophthalmic artery, or ciliary arteries may cause this transient monocular blindness. Atherosclerotic carotid artery: Amaurosis ... 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 ...
... may refer to Circulus arteriosus major, an anastomosis of the anterior ciliary arteries Circulus arteriosus ...
... 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 ...
... 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 ...
... 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 ...
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 ...
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, ...
Dorsal nasal artery Long posterior ciliary arteries Short posterior ciliary arteries Anterior ciliary artery Central retinal ... Lacrimal artery Supraorbital artery Posterior ethmoidal artery Anterior ethmoidal artery Internal palpebral artery ... Long posterior ciliary arteries Aa. ciliares posteriores longae. *Short posterior ciliary arteries Aa. ciliares posteriores ... Posterior ciliary arteries[edit]. The OA then turns medially, giving off 1 to 5 posterior ciliary arteries (PCA) that ...
However it should be remembered that the Cilio retinal artery itself is a branch of the Short Posterior Ciliary Arteries which ... The central retinal artery (retinal artery) branches off the ophthalmic artery, running inferior to the optic nerve within its ... ACA (anterior communicating, Recurrent artery of Heubner, Orbitofrontal artery). *MCA (anterolateral central, Prefrontal artery ... In dogs, it is the continuation of the long ciliary artery.[citation needed] ...
... 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 word ciliary had its origins around 1685-1695. The term cilia originated a few years later in 1705-1715, and is the Neo- ...
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. ...
They run forward with the ciliary arteries in a wavy course, one set above and the other below the optic nerve, and are ... 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 branches of the ciliary ganglion are the short ciliary nerves. These are delicate filaments, from six to ten in number, ...
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 rectus ... 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. ...
... 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 ...
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, ... ophthalmic artery. There are two in each eye. They pierce the posterior part of the sclera at some little distance from the ...
The short posterior ciliary arteries, around twenty in number arise from the medial posterior ciliary artery and lateral ... Long posterior ciliary arteries Anterior ciliary arteries Gray's anatomy : the anatomical basis of clinical practice. Standring ... 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 ...
Central retinal artery occlusion. *Branch retinal artery occlusion. *Retinopathy *diabetic. *hypertensive. *Purtscher's ...
Artery. lacrimal artery, anterior ciliary arteries. Nerve. supratrochlear nerve. Identifiers. Latin. tunica conjunctiva. ... PAVLOU AT; WOLFF HG (1959-07-01). "THe bulbar conjunctival vessels in occlusion of the internal carotid artery". Archives of ...
Central retinal artery occlusion. *Retinopathy *diabetic. *hypertensive. *Purtscher's. *of prematurity. *Bietti's crystalline ...
Origin of arteries[edit]. The left and right internal carotid arteries arise from the left and right common carotid arteries. ... ciliary (short posterior, long posterior, anterior). *Circulus arteriosus major. *hypophysial (superior, inferior) ... The vertebral arteries arise from the subclavian arteries. The anterior communicating artery connects the two anterior cerebral ... ACA (anterior communicating, Recurrent artery of Heubner, Orbitofrontal artery). *MCA (anterolateral central, Prefrontal artery ...
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) ...
Central retinal artery occlusion. *Retinopathy *diabetic. *hypertensive. *Purtscher's. *of prematurity. *Bietti's crystalline ...
Central retinal artery occlusion. *Branch retinal artery occlusion. *Retinopathy *diabetic. *hypertensive. *Purtscher's ...
Viral conjunctivitis manifests as a fine, diffuse pinkness of the conjunctiva, which is easily mistaken for a ciliary infection ... Central retinal artery occlusion. *Branch retinal artery occlusion. *Retinopathy *diabetic. *hypertensive. *Purtscher's ...
ciliary (short posterior, long posterior, anterior). *Circulus arteriosus major. *hypophysial (superior, inferior) ... ACA (anterior communicating, Recurrent artery of Heubner, Orbitofrontal artery). *MCA (anterolateral central, Prefrontal artery ... The inferior thyroid artery is an artery in the neck. It arises from the thyrocervical trunk and passes upward, in front of the ... Inferior thyroid artery. Thyrocervical trunk and its branches, including inferior thyroid artery. Superficial dissection of the ...
There is no costocervical artery. There is no direct connection between the internal carotid artery and the vessels of the ... There are no ciliary muscles. The choroid is very thick and contains a fibrous tapetum lucidum. Like other toothed whales, the ... The arteries that leave the aortic arch are positioned symmetrically. ...
Testicular artery. শিরা. Testicular vein, Pampiniform plexus. স্নায়ু. Spermatic plexus. লসিকা. Lumbar lymph nodes. ... পক্ষ্মল অঙ্গক (Ciliary body). *অক্ষিকাচ (অক্ষি পরকলা) (lens). *অক্ষিপট (Retina). *দর্শন স্নায়ু (Optic nerve) ...
Qureshi, T. A.; Habib, M.; Hunter, A.; Al-Diri, B. (June 2013). A manually-labeled, artery/vein classified benchmark for the ... Veins are darker and slightly wider than corresponding arteries. The optic disc is at right, and the macula lutea is near the ... Retinal vessel analysis is a non-invasive method to examine the small arteries and veins in the retina which allows to draw ... the ophthalmic artery bifurcates and supplies the retina via two distinct vascular networks: the choroidal network, which ...
Central retinal artery occlusion. *Branch retinal artery occlusion. *Retinopathy *diabetic. *hypertensive. *Purtscher's ...
ACA (anterior communicating, Recurrent artery of Heubner, Orbitofrontal artery). *MCA (anterolateral central, Prefrontal artery ... ciliary (short posterior, long posterior, anterior). *Circulus arteriosus major. *hypophysial (superior, inferior) ... The arteries and veins have three layers. The middle layer is thicker in the arteries than it is in the veins: *The inner layer ... In all arteries apart from the pulmonary artery, hemoglobin is highly saturated (95-100%) with oxygen. In all veins apart from ...
Central retinal artery occlusion. *Branch retinal artery occlusion. *Retinopathy *diabetic. *hypertensive. *Purtscher's ...
Central retinal artery occlusion. *Branch retinal artery occlusion. *Retinopathy *diabetic. *hypertensive. *Purtscher's ...
ciliary (short posterior, long posterior, anterior). *Circulus arteriosus major. *hypophysial (superior, inferior) ... Deep lingual artery[edit]. The deep lingual artery (or ranine artery) is the terminal portion of the lingual artery after the ... Lingual artery. Depiction of the neck with muscles and arteries shown. The lingual artery arises from the external carotid ... The lingual artery arises from the external carotid between the superior thyroid artery and facial artery. It can be located ...
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 gustatory cortex is the primary receptive area for taste. The word taste is used in a technical sense to refer specifically to sensations coming from taste buds on the tongue. The five qualities of taste detected by the tongue include sourness, bitterness, sweetness, saltiness, and the protein taste quality, called umami. In contrast, the term flavor refers to the experience generated through integration of taste with smell and tactile information. The gustatory cortex consists of two primary structures: the anterior insula, located on the insular lobe, and the frontal operculum, located on the frontal lobe. Similarly to the olfactory cortex, the gustatory pathway operates through both peripheral and central mechanisms.[clarification needed] Peripheral taste receptors, located on the tongue, soft palate, pharynx, and esophagus, transmit the received signal to primary sensory axons, where the signal is projected to the nucleus of the solitary tract in the medulla, or the gustatory nucleus of ...
In atherosclerosis, an underlying cause of Coronary artery disease and strokes, atheromatous plaques accumulate in the vascular ... "Ciliary dysfunction and ultrastructural abnormalities are features of severe asthma". Journal of Allergy and Clinical ...
ciliary (short posterior, long posterior, anterior). *Circulus arteriosus major. *hypophysial (superior, inferior) ... This artery branches from the superior thyroid artery near its bifurcation from the external carotid artery. Together with the ... The infrahyoid branch (or hyoid artery): a small artery that runs along the lower border of the hyoid bone beneath the ... This artery must be ligated at the thyroid when conducting a thyroidectomy. If the artery is severed, but not ligated, it will ...
The ophthalmic artery is a crucial structure in the orbit, as it is often the only source of collateral blood to the brain in ... ciliary ganglion and short ciliary nerves. ... and the ophthalmic artery, and sits at the junction of the ... It is not as important in function, though it does contain a few branches of the maxillary nerve and the infraorbital artery ...
... transverse myelitis and ciliary ganglionitis[6]), and cutaneous manifestations, including poliosis, vitiligo, and alopecia.[4][ ... Central retinal artery occlusion. *Retinopathy *diabetic. *hypertensive. *Purtscher's. *of prematurity. *Bietti's crystalline ...
ciliary (short posterior, long posterior, anterior). *Circulus arteriosus major. *hypophysial (superior, inferior) ... Vertebral arteries. Branches. Pontine arteries, anterior inferior cerebellar (AICA) and superior cerebellar arteries, and ... ACA (anterior communicating, Recurrent artery of Heubner, Orbitofrontal artery). *MCA (anterolateral central, Prefrontal artery ... The basilar artery (/ˈbæz.ɪ.lər/)[1][2] is one of the arteries that supplies the brain with oxygen-rich blood. ...
The intestinal atresia is of the "apple-peel" type, in which the remaining intestine is twisted around its main artery. The ... "Strømme Syndrome Is a Ciliary Disorder Caused by Mutations in CENPF". Human Mutation. 37 (4): 359-363. doi:10.1002/humu.22960. ... an uncommon type in which the remaining portion of the intestine is found twisted around its main artery, and this usually ...
... 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 ...
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. ...
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 rectus ... 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. ...
Definition of anterior ciliary arteries. Provided by Stedmans medical dictionary and Drugs.com. Includes medical terms and ... anterior ciliary arteries. Definition: one of several arteries derived from muscular branches of the ophthalmic arteries that ... perforate the anterior part of the sclera and anastomose with posterior ciliary arteries and contribute to the greater arterial ... circle of the iris, supplying the anterior vascular layer of the eyeball: iris, ciliary body, and anterior choroid. ...
ciliary artery synonyms, ciliary artery pronunciation, ciliary artery translation, English dictionary definition of ciliary ... Noun 1. ciliary artery - one of several arteries supplying the choroid coat of the eye arteria ciliaris eye, oculus, optic - ... Ciliary artery - definition of ciliary artery by The Free Dictionary https://www.thefreedictionary.com/ciliary+artery ... ciliary artery - one of several arteries supplying the choroid coat of the eye. arteria ciliaris ...
... ciliary arteries, arteries, ciliary:. Long Posterior Ciliary Arteries. ... The long posterior ciliary arteries are arteries of ... Additional branches of the ophthalmic artery include the ciliary arteries, which branch into the anterior ciliary arteries ... ... Ciliary Arteries. The ciliary arteries are divisible into three groups, the long posterior, short posterior, and the anterior. ... due to a temporary reduction in retinal artery, ophthalmic artery, or ciliary artery blood flow, leading to a decrease in ...
... includes Posterior ciliary arteries Long posterior ciliary arteries Short posterior ciliary arteries Anterior ciliary artery ... Posterior Ciliary Arteries. Some articles on posterior ciliary arteries, arteries, ciliary:. Ophthalmic Artery - Course and ... Posterior Ciliary Arteries. ... The OA then turns medially giving off 1 to 5 posterior ciliary arteries (PCA) that subsequently ... anatomists made little distinction between the posterior ciliary arteries and the short and long posterior ciliary arteries ...
The anterior ciliary arteries are derived from the muscular branches of the Ophthalmic Artery. ... Anterior+ciliary+artery at eMedicine Dictionary. This article was originally based on an entry from a public domain edition of ... vertebral artery. meningeal - spinal (posterior, anterior) - cerebellar (PICA). basilar: pontine - labyrinthine - cerebellar ( ... ocular group: central retinal - ciliary (short posterior, long posterior, anterior) - hypophysial (superior, inferior). ...
... incomplete central retinal artery occlusion associated with short posterior ciliary artery occlusion is extremely rare. Herein ... After the central retinal artery branches from the ophthalmic artery, a varying number of posterior ciliary arteries arise. ... As the short posterior ciliary artery branches from the ophthalmic artery, the anatomical location of the lesion might be near ... In this case, spasms of the ophthalmic artery and occlusion of the short posterior ciliary artery occurred simultaneously. As ...
"Ciliary Arteries" by people in this website by year, and whether "Ciliary Arteries" was a major or minor topic of these ... "Ciliary Arteries" is a descriptor in the National Library of Medicines controlled vocabulary thesaurus, MeSH (Medical Subject ... Below are the most recent publications written about "Ciliary Arteries" by people in Profiles. ... Below are MeSH descriptors whose meaning is more general than "Ciliary Arteries". ...
Overend, Jill (2007) Biphasic neurogenic vasodilatation in the bovine intraocular long posterior ciliary artery. PhD thesis, ... 1.Previous research in the bovine intraocular long posterior ciliary artery (LPCA) has suggested that its response to ... nitric oxide, nitrergic, neurotransmission, bovine, intraocular long posterior ciliary artery, VIP, CGRP, L-NAME, L-NMMA.. ... not inhibit nitrergic nerve-mediated relaxation in other bovine tissues including the retractor penis muscle or penile artery. ...
Effects of ripasudil hydrochloride hydrate(K-115), a Rho-kinase inhibitor, on ocular blood flow and ciliary artery smooth ... on ocular blood flow and ciliary artery smooth muscle contraction in rabbits. 兎の眼血流および毛様動脈に対す
M C Koss; Analysis of blood flow in the long posterior ciliary artery of the cat.. Invest. Ophthalmol. Vis. Sci. 1999;40(3):800 ... Analysis of blood flow in the long posterior ciliary artery of the cat. ... Analysis of blood flow in the long posterior ciliary artery of the cat. ... were undertaken to use a new technique for direct on-line measurement of blood flow in the long posterior ciliary artery (LPCA ...
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P Zhu, J L Bény, J Flammer, T F Lüscher, I O Haefliger; Relaxation by bradykinin in porcine ciliary artery. Role of nitric ... CONCLUSIONS: In porcine ciliary artery, the endothelium-dependent relaxations to bradykinin are primarily mediated by NO and ... PURPOSE: To assess the effects of K(+)-channel blockers on bradykinin-induced relaxations in porcine ciliary artery. METHODS: ... Vasoactive Responses of U46619, PGF2α, Latanoprost, and Travoprost in Isolated Porcine Ciliary Arteries ...
Airway-artery quantitative assessment on chest computed tomography in paediatric primary ciliary dyskinesia. Valentina Ferraro ... Airway-artery quantitative assessment on chest computed tomography in paediatric primary ciliary dyskinesia ... Airway-artery quantitative assessment on chest computed tomography in paediatric primary ciliary dyskinesia ... Airway-artery quantitative assessment on chest computed tomography in paediatric primary ciliary dyskinesia ...
Artery. short posterior ciliary arteries. Identifiers. Latin. processus ciliares. TA. A15.2.03.011. ... The ciliary processes produce aqueous humour. References[edit]. This article incorporates text in the public domain from page ... The ciliary processes are formed by the inward folding of the various layers of the choroid, i.e., the choroid proper and the ... Ciliary process visible superior to the lens, immediately above the Zonule of Zinn. ...
Short posterior ciliary arteries aka Arteriae ciliares posteriores breves in the latin terminology and part of arteries and ... Short posterior ciliary arteries Arteriae ciliares posteriores breves Close. Want more colour?. Register for free to get this ... AnatomyHead & NeckOrbit and contentsBlood vessels of the eyeballShort posterior ciliary arteries ... Arteries and Veins of the Orbit This is an article covering the anatomy of the arteries and veins of the orbit. Learn all about ...
What is profunda femoris artery? Meaning of profunda femoris artery medical term. What does profunda femoris artery mean? ... Looking for online definition of profunda femoris artery in the Medical Dictionary? profunda femoris artery explanation free. ... ciliary artery. The anterior ciliary, the short posterior ciliary, or the long posterior ciliary arteries, which supply blood ... profunda femoris artery. Deep femoral artery.. artery of the pterygoid canal. Vidian artery.. pudendal artery. The external or ...
The aim of our study was to verify the existence of refractoriness in ophthalmic ciliary arteries and, if present, to analyze ... Refractoriness to the effect of endothelin-1 in porcine ciliary arteries. Journal of ocular pharmacology and therapeutics, Vol ... METHODS: Twenty freshly isolated porcine ciliary arteries were placed in a myograph system to measure isometric forces. Each ... Our experiment with isolated porcine ophthalmic ciliary arteries revealed a refractoriness phase to ET after an acute ...
Occlusion of the posterior ciliary arteries after surgery for retinal detachment. R. Brancato, U. Menchini, A. Pece, F. ...
... in external ophthalmic and the long ciliary ophthalmic arteries in the cat by pulse Doppler. Design- Descriptive study Animals ... The PSV, EDV and RI in external ophthalmic artery and the long posterior ciliary artery were measured on the right and left ... Vosough, D. Pulse Doppler Analysis in External Ophthalmic and the Long Ciliary Ophthalmic Arteries in the Cat. Iranian Journal ... Vosough, D. (2011). Pulse Doppler Analysis in External Ophthalmic and the Long Ciliary Ophthalmic Arteries in the Cat. Iranian ...
Scleral pits represent degeneration around the posterior ciliary arteries and are signs of disease severity in choroideremia * ...
Dorsal nasal artery Long posterior ciliary arteries Short posterior ciliary arteries Anterior ciliary artery Central retinal ... Lacrimal artery Supraorbital artery Posterior ethmoidal artery Anterior ethmoidal artery Internal palpebral artery ... Long posterior ciliary arteries Aa. ciliares posteriores longae. *Short posterior ciliary arteries Aa. ciliares posteriores ... Posterior ciliary arteries[edit]. The OA then turns medially, giving off 1 to 5 posterior ciliary arteries (PCA) that ...
Ophthalmic artery; ciliary nerves and arteries; sheath of optic nerve; insertion of superior oblique muscle. For permissions ... Ophthalmic artery; ciliary nerves and arteries; sheath of optic nerve; insertion of superior oblique muscle. ... In this specimen the ophthalmic artery passes beneath the optic nerve rather than above it. This is a rather common variation. ...
Ophthalmic artery, 33. Artery and central retinal vein → 36. Blood vessels of the retina; Ciliary arteries (34. Short posterior ... Ciliary body (with a: pars plicata and b: pars plana) and 16. Choroid); 17. Ora serrata, 18. Vitreous humor with 19. Hyaloid ... Lacrimal artery, 39. Ophthalmic vein, 40. Vorticose vein.. 41. Ethmoid bone, 42. Medial rectus muscle, 43. Lateral rectus ... 1. Lens, 2. Zonule of Zinn or Ciliary zonule, 3. Posterior chamber and 4. Anterior chamber with 5. Aqueous humour flow; 6. ...
Synonym(s): short posterior ciliary artery. Print this page Disclaimer: This site is designed to offer information for general ...
... artery to the ophthalmic artery and the other through supraorbital artery-recurrent meningeal artery to the ophthalmic artery. ... artery to the ophthalmic artery and the other through supraorbital artery-recurrent meningeal artery to the ophthalmic artery. ... artery to the ophthalmic artery and the other through supraorbital artery-recurrent meningeal artery to the ophthalmic artery. ... artery to the ophthalmic artery and the other through supraorbital artery-recurrent meningeal artery to the ophthalmic artery. ...
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scohen125 / Cilioretinal Artery Occlusion - Chronic - Posterior Ciliary Artery Occlusion - Choroidal Ischemia / Infarct. ... Cilioretinal artery occlusion and Ophthalmic Artery Occlusion with Relative Sparing of the Central Retinal Artery ...
Ciliary Arteries / physiology* * Glaucoma / physiopathology * Heart Rate / physiology * Humans * Intraocular Pressure * ...
  • The long posterior ciliary arteries, two for each eye, pierce the posterior part of the sclera at some little distance from the optic nerve. (wikipedia.org)
  • one of several arteries derived from muscular branches of the ophthalmic arteries that perforate the anterior part of the sclera and anastomose with posterior ciliary arteries and contribute to the greater arterial circle of the iris, supplying the anterior vascular layer of the eyeball: iris, ciliary body, and anterior choroid. (drugs.com)
  • The anterior ciliary arteries are seven small arteries in each eye-socket that supply the conjunctiva, sclera and the rectus muscles. (wikipedia.org)
  • The long posterior ciliary arteries , two in number, pierce the posterior part of the sclera at some little distance from the optic nerve. (primidi.com)
  • These arteries supply the conjunctiva & sclera . (wikidoc.org)
  • Three groups of arteries found in the eye which supply the iris, pupil, sclera, conjunctiva, and the muscles of the iris. (umassmed.edu)
  • The OA then turns medially, giving off 1 to 5 posterior ciliary arteries (PCA) that subsequently branch into the long and short posterior ciliary arteries (LPCA and SPCA respectively) which perforate the sclera posteriorly in the vicinity of the optic nerve and macula to supply the posterior uveal tract. (wikipedia.org)
  • These arteries, of which there are several, pass through the sclera (the white, outer membrane of the eyeball), supplying the back of the uveal tract, which is the layer of tissue between the inner and outer membranes. (verywellhealth.com)
  • The posterior ciliary vessels originate from the ophthalmic artery and supply the entire uveal tract, cilioretinal arteries, the sclera, the margin of the cornea, and the adjacent conjunctiva. (uhms.org)
  • 4) aqueous flow into cut ends of Schlemm's canal into collector channels and episcleral veins (5) into a cyclodialysis cleft between the ciliary body and the sclera if tissue is dissected posterior to the scleral spur. (wikipedia.org)
  • According to some authors, the ciliary muscle originates from a protrusion of the sclera into the anterior chamber of the eye, also known as the scleral spur . (kenhub.com)
  • Any of numerous small branches of the anterior ciliary arteries that perforate the sclera behind the cornea to supply the iris and ciliary body. (dictionary.com)
  • The arteries of the choroid and iris. (wikidoc.org)
  • The ciliary processes are formed by the inward folding of the various layers of the choroid , i.e., the choroid proper and the lamina basalis , and are received between corresponding foldings of the suspensory ligament of the lens . (wikipedia.org)
  • The long posterior ciliary arteries provide blood to the choroid and the outer layers of the retina. (uhms.org)
  • The ciliary muscle occupies the biggest portion of the ciliary body, which lies between the anterior border of the choroid and iris. (kenhub.com)
  • The ciliary body is an inner eye structure that forms a semi-transparent ring on the outer surface of the choroid. (kenhub.com)
  • The outermost longitudinal layer of ciliary muscle inserts onto the anterior one-third of the choroid , while the radial fibers insert onto the connective tissue of the base of ciliary processes. (kenhub.com)
  • Besides the ciliary body, they also supply the iris and the anterior aspect of the choroid. (kenhub.com)
  • Uveal melanomas are likely to be pigmented and lobulated primary choroid or ciliary body tumours but can also arise in the iris. (edu.au)
  • The outer layer of the choroid (lamina vasculosa) consists, in part, of the larger branches of the short ciliary arteries which run forward between the veins, before they bend inward to end in the capillaries, but is formed principally of veins, named, from their arrangement, the vorticose veins. (ebi.ac.uk)
  • The inner retinal vessels, which originate from the central retinal artery, and the outer vascular bed termed the choroid, which originates from the ciliary arteries. (uthsc.edu)
  • it is part of the circle of Willis, and it branches from the internal carotid artery at the base of the brain. (thefreedictionary.com)
  • The ophthalmic artery ( OA ) is the first branch of the internal carotid artery distal to the cavernous sinus . (wikipedia.org)
  • The OA emerges from the internal carotid artery usually just after the latter emerges from the cavernous sinus although in some cases, the OA branches just before the internal carotid exits the cavernous sinus. (wikipedia.org)
  • Emerging as the first branch of the internal carotid artery to the side of the cavernous sinus, the ophthalmic artery and its branches supply structures in the orbit of the eye (the cavity that holds the eyeball), parts of the nose, face, and meninges (the membranes that surround the brain). (verywellhealth.com)
  • The ophthalmic artery emerges from the internal carotid artery next to the anterior clinoid process, a bony projection from the skull's sphenoid bone at the side of the head (making up one of the borders of the eye's orbit). (verywellhealth.com)
  • The purpose of this study is to describe the changes in morphology and Retinal vascularization after revascularization of the internal carotid artery. (clinicaltrials.gov)
  • Indeed, the stenosis of the internal carotid artery can lead to ophthalmological charts. (clinicaltrials.gov)
  • The underlying hypothesis is that revascularization of the internal carotid artery would improve ipsilateral and retinal homolateral perfusion in the short term. (clinicaltrials.gov)
  • The stenosis of the internal carotid artery is a frequent and potentially serious pathology (TIA, ischemic stroke, death), which can also be manifested by ophthalmological charts, foremost among which are transient monocular blindness. (clinicaltrials.gov)
  • 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. (uhms.org)
  • Intravascular ultrasound (IVUS) examination was performed to assess the major ocular vessels (i.e., ophthalmic artery, central retinal artery, and posterior ciliary artery ), including the degree of stenosis and haemodynamic changes of the arteries. (thefreedictionary.com)
  • A case of incomplete central retinal artery occlusion associated with short posterior ciliary artery occlusion. (biomedsearch.com)
  • To our knowledge, incomplete central retinal artery occlusion associated with short posterior ciliary artery occlusion is extremely rare. (biomedsearch.com)
  • The vessel soon crosses medially over the nerve and gives rise to its first branch, the central retinal artery. (biomedsearch.com)
  • After the central retinal artery branches from the ophthalmic artery, a varying number of posterior ciliary arteries arise. (biomedsearch.com)
  • The central retinal artery is the first, and one of the smaller branches of the OA and runs in the dura mater inferior to the optic nerve. (wikipedia.org)
  • About 12.5mm (0.5 inch) posterior to the globe, the central retinal artery turns superiorly and penetrates the optic nerve, continuing along the center of the optic nerve, entering the eye to supply the inner retinal layers. (wikipedia.org)
  • Although variations in the peripapillary division pattern of the central retinal artery (CRA) are common, variations in the origin of this artery are seldom reported in the literature. (utmb.edu)
  • Crucial information required in the management of central retinal artery occlusion (CRAO) is the length of time the retina can survive following that. (nih.gov)
  • Classification of acute retinal arterial ischemic disorders: These are of 4 types: CRAO, branch retinal artery occlusion (BRAO), cotton wool spots and amaurosis fugax. (nih.gov)
  • Central retinal artery occlusion: The pathogeneses, clinical features and management of the various types of CRAO are discussed in detail. (nih.gov)
  • Branch retinal artery occlusion: Pathogeneses, clinical features and management of various types of BRAO are discussed at length. (nih.gov)
  • Flow velocities in the central retinal artery, posterior ciliary arteries, and ophthalmic artery were measured in the patients with Behçet's disease. (nih.gov)
  • N.J. David, E.W.D. Noron, J.D. Gass, J. Beauchamp, Fluorescein angiography in central retinal artery occlusion. (springer.com)
  • CDI was used to measure peak systolic and end diastolic velocities (PSV and EDV) and resistance index (RI) in the ophthalmic artery (OA), central retinal artery (CRA), and short posterior ciliary arteries (SPCAs). (bmj.com)
  • The central retinal artery and the central retinal vein. (studystack.com)
  • Central retinal artery occlusion is a relatively rare emergent condition of the eye resulting in sudden painless vision loss. (uhms.org)
  • 1) The central retinal artery enters the globe within the substance of the optic nerve and serves the inner layers of the retina through its many branches. (uhms.org)
  • If a cilioretinal artery is present, central vision may be preserved in central retinal artery occlusion (CRAO). (uhms.org)
  • Superselective intraarterial fibrinolysis in central retinal artery occlusion. (biomedsearch.com)
  • Intraarterial fibrinolysis was performed in three patients with acute central retinal artery occlusion using recombinant tissue plasminogen activator as a fibrinolytic agent. (biomedsearch.com)
  • Partial retinal artery occlusion after coil embolization of an intracerebral aneurysm. (biomedsearch.com)
  • Occlusion of the retinal artery is a rare complication after therapeutic embolization. (biomedsearch.com)
  • We present a case of a partial retinal artery obstruction following coil embolization of an intracerebral aneurysm. (biomedsearch.com)
  • Apart from ophthalmic investigations, significant role of radiological examinations was considered, especially color Doppler ultrasonography of retrobulbar circulation - optic artery, central retinal artery, long posterior ciliary arteries. (doaj.org)
  • Methods In this prospective study we examined the effect of a single oral dose of 50 mg sildenafil (Viagra) in a group of healthy young male volunteers, by using colour Doppler ultrasound imaging to measure haemodynamic variables in the central retinal artery (CRA), short temporal posterior ciliary artery (STPCA) and ophthalmic artery (OA). (nature.com)
  • The short posterior ciliary arteries from six to twelve in number, arise from the ophthalmic artery as it crosses the optic nerve. (wikipedia.org)
  • The ophthalmic artery enters the orbit through the optic canal, usually inferotemporal to the optic nerve. (biomedsearch.com)
  • Conclusion and Clinical Relevance-It is found that in two-dimentional Doppler method, these arteries could be easily identified in ultrasonography and had the most repeatability rate in all experimented eyes and these two arteries could be used as a reference to diagnose optic diseases in future studies. (ivsajournals.com)
  • In this specimen the ophthalmic artery passes beneath the optic nerve rather than above it. (stanford.edu)
  • The ophthalmic artery can also pass superiorly to the optic nerve in a minority of cases. (wikipedia.org)
  • The supraorbital artery branches from the OA as it passes over the optic nerve. (wikipedia.org)
  • This artery passes into the inside of the eye, or orbit, via the optic canal and is especially important for vision. (verywellhealth.com)
  • Because most of degeneration is located on the temporal side of the optic nerve the aim of our study was to assess blood flow parameters in temporal short posterior ciliary arteries (tSPCA) depending on the character of degenerative lesions found in the ocular fundus in myopic people. (thefreedictionary.com)
  • Anterior ischemic optic neuropathy involves interruption of the blood flow in the short posterior ciliary arteries that supply the optic disk. (healthcentral.com)
  • For posterior ischemic optic neuropathy, patients commonly have diabetes , hypertension, and hyperlipidemia , but any thrombotic condition capable of producing intracranial stroke can affect the ciliar arteries as well. (healthcentral.com)
  • Potentially serious ophthalmic problems associated with ROCM include occlusion of the central artery of the retina and infraction of the orbit including the optic nerve and can ultimately cause complete vision loss. (aao.org)
  • A thorough knowledge of the microanatomic features of the ophthalmic artery, optic canal and optic nerve is very important for surgeons approaching lesions of this area. (biomedsearch.com)
  • The ciliary vessels are located medially and the inferior oblique muscles are located laterally to the optic nerve. (edu.au)
  • Best-corrected visual acuity (BCVA) in the left eye was hand motion, and fundus examination revealed a hyperemic optic disk with blurred margins, swelling, retinal folds, dilated veins, and normal size arteries. (frontiersin.org)
  • 2) In order to prevent this possible sight-threatening complication, surgical procedures which spare the anterior ciliary artery should be favored, especially in patients with risk factors. (thefreedictionary.com)
  • In this particular case, spasms of the ophthalmic artery and occlusion of the short posterior ciliary artery occurred simultaneously. (biomedsearch.com)
  • Similarly, BRAO comprises permanent BRAO, transient BRAO and cilioretinal artery occlusion (CLRAO), and the latter further consists of 3 distinct clinical entities - non-arteritic CLRAO alone, non-arteritic CLRAO associated with central retinal vein occlusion and arteritic CLRAO associated with GCA. (nih.gov)
  • S.S. Hayreh, T.A. Weingeist, Experimental occlusion of the central artery of the retina. (springer.com)
  • The visual signs and symptoms of vascular occlusive diseases of the retina are dependent on both the particular vessel occluded, the degree of occlusion, the location of the occlusion, and the presence or absence of a cilioretinal artery. (uhms.org)
  • It causes narrowing of the artery, leading (by wall thickening) to partial (stenosis) or complete obstruction (occlusion) of local arterial blood flow, its clinical manifestations being expressed by signs of local ischemia [ 1 , 2 , 3 , 4 , 5 , 6 ]. (intechopen.com)
  • The next branch of the OA is the lacrimal artery , one of the largest, arises just as the OA enters the orbit and runs along the superior edge of the lateral rectus muscle to supply the lacrimal gland , eyelids and conjunctiva . (wikipedia.org)
  • 38. Lacrimal artery , 39. (wikipedia.org)
  • Two intraorbital anastomoses were also noted between the internal and external carotid arterial systems: one through the lacrimal artery-middle meningeal artery to the ophthalmic artery and the other through supraorbital artery-recurrent meningeal artery to the ophthalmic artery. (utmb.edu)
  • The largest artery to emerge from the ophthalmic artery, the lacrimal artery enters the orbit, crossing the upper edge of the lateral rectus muscle, one of the six muscles involved in eye movement. (verywellhealth.com)
  • 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. (uhms.org)
  • among the various topics briefly discussed are the anatomical features of ophthalmic, central retinal and cilioretinal arteries which may play a role in acute retinal arterial ischemic disorders. (nih.gov)
  • The anterior ciliary arteries also arise from the ophthalmic artery, supply the extraocular muscles, and anastamose with the posterior ciliary vessels to form the major arterial circle of the iris, which supplies the iris and ciliary body. (uhms.org)
  • This artery is part of the ciliary (not retinal) arterial supply but supplies the area of the retina around the macula (central vision area. (uhms.org)
  • Its development is strictly connected with the arterial embryology of the primitive ICA, the stapedial artery (SA), and the pharyngeal artery system. (ajnr.org)
  • The contribution of the sternocleidomastoid branch of the occipital artery, superior arterial pedicle (SAP), to the irrigation of the sternocleidomastoid muscle (SCM) was evaluated in fresh human cadavers by injecting Neoprene-latex for minute dissection. (biomedsearch.com)
  • These arteries form the major arterial circle located near the root of the iris. (kenhub.com)
  • Further, at night, when ophthalmic artery flow velocities fall as arterial blood pressure falls in glaucoma patients, the risk of disease progression may be increased. (deepdyve.com)
  • the superior, inferior and medial, are supplied by two ciliary arteries each, while the lateral rectus only receives one branch. (wikipedia.org)
  • branches , lateral circumflex femoral, medial circumflex femoral, terminating in three or four perforating arteries. (thefreedictionary.com)
  • [1] In the posterior third of the cone of the orbit, the ophthalmic artery turns sharply and medially to run along the medial wall of the orbit. (wikipedia.org)
  • The supraorbital artery passes anteriorly along the medial border of the superior rectus and levator palpebrae and through the supraorbital foramen to supply muscles and skin of the forehead. (wikipedia.org)
  • The OA continues anteriorly to the trochlea, where the medial palpebral arteries (superior and inferior) arise and supply the eyelids. (wikipedia.org)
  • Smaller branches of the ophthalmic artery including the ethmoid arteries (supplying the sinuses, nose, and the meninges, the membrane enclosing the brain and spinal cord), and the medial palpebral arteries (which reach the upper and lower eyelids), among others. (verywellhealth.com)
  • Pulse Doppler Analysis in External Ophthalmic and the Long Ciliary Ophthalmic Arteries in the Cat', Iranian Journal of Veterinary Surgery , 06(1-2), pp. 9-16. (ivsajournals.com)
  • Objective- Analysis of the PSV (peak systolic velocity), EDV (end diastolic velocity) and RI (Resistant Index ) in external ophthalmic and the long ciliary ophthalmic arteries in the cat by pulse Doppler. (ivsajournals.com)
  • Color Doppler ultrasound of the temporal arteries--a new method for diagnosing temporal arteritis]. (medscape.com)
  • Color Doppler sonography of the temporal arteries in giant cell arteritis and polymyalgia rheumatica. (medscape.com)
  • Diamantopoulos AP, Haugeberg G, Hetland H, Soldal DM, Bie R, Myklebust G. The diagnostic value of color Doppler ultrasonography of temporal arteries and large vessels in giant cell arteritis: A consecutive case series. (medscape.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)
  • Evaluation of blood flow velocity parameters in retrobulbar arteries in color Doppler ultrasonography is the most valuable screening in monitoring ophthalmic dysregulation in presented disorders. (doaj.org)
  • RBF was measured twice per day (8-20 h) using Color Doppler imaging in the ophthalmic (OA), central retinal (CRA), nasal (nSPCA) and temporal (tSPCA) posterior ciliary arteries. (mdpi.com)
  • Patients examinations included pneumotonometry, authomatic perimetry and Color Doppler Imaging (CDI) by an Asynchronous-Hitachi analyzer with a 7.5 MHz linear probe in the ophthalmic artery and posterior ciliary arteries, before and after 18 months of therapy. (mcmaster.ca)
  • 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)
  • Giant cell arteritis (GCA) is a primary vasculitis that affects especially extracranial medium-sized arteries, such as superficial temporal arteries (TAs). (intechopen.com)
  • Giant cell arteritis (GCA) is a primary (non-necrotizing granulomatous) vasculitis of autoimmune etiology, which especially affects extra cranial medium-sized arteries (branches of the external carotid arteries-ECAs-particularly the superficial temporal arteries-TAs) and sometimes large-sized arteries (aorta and its major branches). (intechopen.com)
  • Polyarteritis nodosa (PAN) presents as a necrotizing vasculitis that affects medium-sized arteries. (frontiersin.org)
  • Medium- and large-sized vessels that may be involved include the aorta and the carotid, subclavian, and iliac arteries. (medscape.com)
  • However, smaller vessels can also be affected: for example, often not just the ophthalmic artery with its extraparenchymal branches are affected, but also small ciliary arteries ( 2 ). (aerzteblatt.de)
  • This is an article covering the anatomy of the arteries and veins of the orbit. (kenhub.com)
  • Add arteries and veins, aqueous humor, corneosclera. (wikipedia.org)
  • The blood from the ciliary body is drained by vorticose veins (vortex veins). (kenhub.com)
  • 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. (arvojournals.org)
  • 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. (arvojournals.org)
  • AION results in a vascular insufficiency in the short posterior ciliary arteries (SPCA). (hindawi.com)
  • The ophthalmic artery (OA) is a very fascinating artery for its complex embryologic development and also for numerous vascular anastomoses developed with branches of the external carotid artery (ECA). (ajnr.org)
  • Meyer, 1 in 1887, considered a pioneer in the orbital vascular anatomy, was the first to precisely describe all branches of the ophthalmic artery, including its dural territory. (ajnr.org)
  • The idiopathic type involves mainly vascular occlusive disease or disorders that reduce the circulation of blood in the short posterior ciliary arteries that supply the optical disk. (healthcentral.com)
  • When intraocular pressure is acutely elevated in healthy individuals, the resistance index (derived from the peak systolic and end-diastolic velocities and an indirect index of vascular resistance distal to the site of measurement) in the central retinal and posterior ciliary arteries increases progressively. (deepdyve.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)
  • Urgent diagnosis based on history and clinical exam, lab testing for elevation of systemic inflammatory markers, and, ultimately, superficial temporal artery biopsy displaying intimal thickening and giant cell formation is essential, as prompt initiation of corticosteroids may prevent ischemia-related vision loss, especially in the contralateral unaffected eye. (healio.com)
  • The diagnostic assessment comprises laboratory testing (erythrocyte sedimentation rate, C-reactive protein), imaging studies (duplex sonography, high-resolution magnetic resonance imaging, positron-emission tomography), and temporal artery biopsy. (aerzteblatt.de)
  • The OA terminates in two branches, the supratrochlear (or frontal) artery and the dorsal nasal artery. (wikipedia.org)
  • In the largest proportion of cases-around 50% of the time-the communicating branch between the ophthalmic artery and the middle meningeal artery runs through the superior orbital fissure. (verywellhealth.com)
  • This is known as the sphenoidal artery, recurrent meningeal artery, or the orbital branch of the middle meningeal artery. (verywellhealth.com)
  • About 15% of the time, there are multiple communicating branches between the middle meningeal and ophthalmic arteries. (verywellhealth.com)
  • In other cases, there is a complete absence of ophthalmic artery, and the middle meningeal artery supplies the entire orbit. (verywellhealth.com)
  • In some cases, the middle meningeal artery arises directly from the ophthalmic artery. (verywellhealth.com)
  • The ophthalmic artery can also arise from the middle meningeal artery, the middle cerebellar artery , or the posterior communicating artery. (verywellhealth.com)
  • The concomitant embryologic development of the ophthalmic artery and middle meningeal artery explains adequately the important varieties of anastomosis between these 2 arteries. (ajnr.org)
  • In this review, we focused on dural branches of the ophthalmic artery with the description of rare variations possible, in particular the ophthalmic artery origin of the middle meningeal artery and the ophthalmic artery origin of the marginal tentorial artery. (ajnr.org)
  • In two cases the ophthalmic artery was selectively catheterized, and in the other a thrombolytic drug was infused into the ophthalmic artery by way of the meningeal collaterals. (biomedsearch.com)
  • Giant cell arteritis (GCA) is a systemic vasculitis of unknown etiology commonly involving cranial arteries. (healio.com)
  • The ciliary ganglion receives preganglionic fibers via the oculomotor nerve (cranial nerve III) that originate from the Edinger-Westphal nucleus in the midbrain . (kenhub.com)
  • Relaxation by bradykinin in porcine ciliary artery. (arvojournals.org)
  • PURPOSE: To assess the effects of K(+)-channel blockers on bradykinin-induced relaxations in porcine ciliary artery. (arvojournals.org)
  • CONCLUSIONS: In porcine ciliary artery, the endothelium-dependent relaxations to bradykinin are primarily mediated by NO and involve K(+)-channels. (arvojournals.org)
  • Neurogenic nitric oxide accounts for the nonadrenergic noncholinergic vasodilation in human posterior ciliary arteries. (semanticscholar.org)
  • As the short posterior ciliary artery branches from the ophthalmic artery, the anatomical location of the lesion might be near the branching of both arteries. (biomedsearch.com)
  • It also explains the presence of many dural branches from the ophthalmic artery. (ajnr.org)
  • The left and right anterior spinal arteries are initially branches from the vertebral arteries, but as they descend to the hindbrain-spinal cord junction, they merge into a single midline artery that runs along the ventral surface of the spinal cord (in the anterior median sulcus). (thefreedictionary.com)
  • Characteristically in GCA, it is branches of the carotid and vertebral arteries that are preferentially affected by the inflammatory process. (aerzteblatt.de)
  • The superior, the middle, or the inferior adrenal artery, all of which supply blood to the adrenal glands. (thefreedictionary.com)
  • The superior adrenal artery is a branch of the inferior phrenic artery, the middle adrenal artery is a branch of the aorta, and the inferior adrenal artery is a branch of the renal artery. (thefreedictionary.com)
  • The superior or the inferior alveolar artery (branches of the maxillary artery), which supply blood to the bones, gingivae, and teeth of the upper and lower jaws. (thefreedictionary.com)
  • Variations in the anatomy of this artery, present at birth, tend to relate to the way the orbit of the eye is supplied. (verywellhealth.com)
  • Another aspect of ophthalmic artery anatomy that sees a great deal of variation has to do with where it originates and where it enters the orbit. (verywellhealth.com)
  • In this article, we will discuss the anatomy and function of ciliary muscle. (kenhub.com)
  • Ciliary Arteries" is a descriptor in the National Library of Medicine's controlled vocabulary thesaurus, MeSH (Medical Subject Headings) . (umassmed.edu)
  • Giant cell arteritis is a systemic obliterative vasculitis mainly involving the arteries that originate from the arch of the aorta. (medscape.com)
  • Cases involving the proximal distal aorta and the subclavian and abdominal arteries have been reported. (medscape.com)
  • 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)
  • Paediatric case of ductal origin of right pulmonary artery presenting with exertional dyspnoea and mimicking asthma and primary ciliary dyskinesia. (annals.org)
  • Because of the obvious importance of the ocular globe, branches of the ophthalmic artery often are subdivided into two groups: those that supply the eyeball (ocular group) and those that supply non-ocular orbital structures (orbital group). (wikipedia.org)
  • The ciliary muscle receives parasympathetic innervation from the short ciliary nerves (postganglionic fibers) that arise from the ciliary ganglion. (kenhub.com)
  • Ciliary process visible superior to the lens, immediately above the Zonule of Zinn. (wikipedia.org)
  • Zonule of Zinn or Ciliary zonule , 3. (wikipedia.org)
  • The ciliary arteries are divisible into three groups, the long posterior, short posterior, and the anterior. (wikipedia.org)
  • 1.Previous research in the bovine intraocular long posterior ciliary artery (LPCA) has suggested that its response to electrical field stimulation (EFS) is a uniphasic vasodilatation, mediated jointly by the neurotransmitters nitric oxide (NO) and calcitonin gene related-peptide (CGRP). (gla.ac.uk)
  • Analysis of blood flow in the long posterior ciliary artery of the cat. (arvojournals.org)
  • The PSV, EDV and RI in external ophthalmic artery and the long posterior ciliary artery were measured on the right and left eyes. (ivsajournals.com)
  • There are approximately twenty short posterior ciliary arteries and usually two long posterior ciliary arteries. (uhms.org)
  • Contrary to the universal belief, pathogenetically, clinically and for management, CRAO is not one clinical entity but 4 distinct clinical entities - non-arteritic CRAO, non-arteritic CRAO with cilioretinal artery sparing, arteritic CRAO associated with giant cell arteritis (GCA) and transient non-arteritic CRAO. (nih.gov)
  • The anterior ciliary arteries are derived from the muscular branches of the ophthalmic artery. (wikipedia.org)
  • The anterior ciliary arteries are branches of the ophthalmic artery and run to the front of the eyeball in company with the extraocular muscles. (wikipedia.org)
  • Most of the ophthalmic artery orbital branches develop from the formation and regression of the stapedial artery and share their origin with dural branches of the ophthalmic artery. (ajnr.org)