Long posterior ciliary arteries: Difference between revisions

General Information
Latin	arteriae ciliares posteriores longae
Greek
TA98
TA2
FMA
Details
System
Artery
Vein
Nerve
Lymphatic drainage
Precursor
Function
Identifiers
Clinical significance
Notes

Newer edit →

Revision as of 02:41, 11 December 2024

Blood vessel

The long posterior ciliary arteries are two arteries in each eye that play a crucial role in the blood supply to the eye, particularly the choroid, ciliary body, and iris. These arteries are branches of the ophthalmic artery, which itself is a branch of the internal carotid artery.

Anatomy

The long posterior ciliary arteries originate from the ophthalmic artery as it travels through the orbit. Each eye typically has two long posterior ciliary arteries, one medial and one lateral. These arteries run forward between the sclera and the choroid, supplying blood to the anterior segment of the eye.

The long posterior ciliary arteries pierce the sclera near the optic nerve and travel forward in the suprachoroidal space. They do not branch significantly until they reach the ciliary body, where they form an arterial circle known as the major arterial circle of the iris. This circle is crucial for supplying blood to the iris and ciliary body.

Function

The primary function of the long posterior ciliary arteries is to supply oxygenated blood to the anterior segment of the eye, including the ciliary body and iris. This blood supply is essential for the production of aqueous humor by the ciliary processes and for maintaining the health and function of the iris.

Clinical significance

The long posterior ciliary arteries are important in various clinical conditions. Compromise of these arteries can lead to ischemia of the anterior segment of the eye, potentially resulting in conditions such as anterior ischemic optic neuropathy or uveitis. Understanding the anatomy and function of these arteries is crucial for ophthalmologists and other medical professionals involved in the diagnosis and treatment of eye diseases.

Also see

Template:Arteries of the head and neck

@@ Line 1: / Line 1: @@
-== Long Posterior Ciliary Arteries ==
+{{Infobox artery
+| name = Long posterior ciliary arteries
+| Latin = arteriae ciliares posteriores longae
+| image = Gray873.png
+| caption = The long posterior ciliary arteries are shown in the diagram of the blood supply to the eye.
+| branchfrom = [[Ophthalmic artery]]
+| branchto = Ciliary body, Iris
+| supplies = [[Choroid]], [[Ciliary body]], [[Iris]]
+}}
-The long posterior ciliary arteries (LPCAs) are a pair of arteries that play a crucial role in the blood supply to the posterior segment of the eye. They are branches of the ophthalmic artery, which is a branch of the internal carotid artery. The LPCAs are responsible for supplying oxygenated blood to the choroid, ciliary body, and iris.
+The '''long posterior ciliary arteries''' are two arteries in each eye that play a crucial role in the blood supply to the eye, particularly the [[choroid]], [[ciliary body]], and [[iris]]. These arteries are branches of the [[ophthalmic artery]], which itself is a branch of the [[internal carotid artery]].
-=== Anatomy ===
+==Anatomy==
+The long posterior ciliary arteries originate from the ophthalmic artery as it travels through the orbit. Each eye typically has two long posterior ciliary arteries, one medial and one lateral. These arteries run forward between the sclera and the choroid, supplying blood to the anterior segment of the eye.
-The LPCAs arise from the ophthalmic artery just before it enters the optic nerve. They travel along the outer surface of the optic nerve and divide into two main branches: the lateral and medial LPCAs. The lateral LPCA supplies the lateral half of the choroid, while the medial LPCA supplies the medial half.
+The long posterior ciliary arteries pierce the sclera near the optic nerve and travel forward in the suprachoroidal space. They do not branch significantly until they reach the ciliary body, where they form an arterial circle known as the major arterial circle of the iris. This circle is crucial for supplying blood to the iris and ciliary body.
-The LPCAs run in a circumferential manner around the optic nerve, forming an arterial circle known as the circle of Zinn-Haller. This circle provides collateral circulation to the posterior segment of the eye, ensuring a constant blood supply even in the presence of occlusion or stenosis of the LPCAs.
+==Function==
+The primary function of the long posterior ciliary arteries is to supply oxygenated blood to the anterior segment of the eye, including the ciliary body and iris. This blood supply is essential for the production of aqueous humor by the ciliary processes and for maintaining the health and function of the iris.
-=== Function ===
+==Clinical significance==
+The long posterior ciliary arteries are important in various clinical conditions. Compromise of these arteries can lead to ischemia of the anterior segment of the eye, potentially resulting in conditions such as anterior ischemic optic neuropathy or uveitis. Understanding the anatomy and function of these arteries is crucial for ophthalmologists and other medical professionals involved in the diagnosis and treatment of eye diseases.
-The main function of the LPCAs is to supply oxygenated blood to the choroid, ciliary body, and iris. The choroid is a highly vascular layer located between the retina and the sclera. It provides nourishment to the outer layers of the retina, including the photoreceptor cells, and helps maintain the temperature and metabolic balance of the eye.
+==Also see==
+* [[Ophthalmic artery]]
+* [[Choroid]]
+* [[Ciliary body]]
+* [[Iris]]
+* [[Anterior segment of the eye]]
-The ciliary body is a ring-shaped structure located behind the iris. It produces aqueous humor, a clear fluid that fills the anterior chamber of the eye. The LPCAs supply the ciliary body with the necessary nutrients and oxygen for the production of aqueous humor.
+{{Arteries of the head and neck}}
-The iris is the colored part of the eye that controls the amount of light entering the eye by adjusting the size of the pupil. The LPCAs provide blood supply to the iris, ensuring its proper function and maintaining its health.
+[[Category:Arteries of the head and neck]]
+[[Category:Ophthalmology]]
-=== Clinical Significance ===
-Any disruption in the blood supply to the posterior segment of the eye can lead to serious visual complications. Occlusion or stenosis of the LPCAs can result in ischemia (lack of blood flow) to the choroid, ciliary body, and iris, leading to various conditions such as choroidal ischemia, ciliary body dysfunction, and iris atrophy.
-Choroidal ischemia can cause vision loss, as the choroid is responsible for supplying oxygen and nutrients to the outer layers of the retina. Ciliary body dysfunction can result in decreased production of aqueous humor, leading to increased intraocular pressure and the development of glaucoma. Iris atrophy can cause irregularities in the shape and function of the pupil, affecting the visual acuity and light sensitivity of the eye.
-=== Conclusion ===
-The long posterior ciliary arteries are essential for maintaining the blood supply to the posterior segment of the eye. They play a crucial role in supplying oxygen and nutrients to the choroid, ciliary body, and iris. Any disruption in their blood flow can lead to serious visual complications. Understanding the anatomy and function of the LPCAs is important for diagnosing and managing various eye conditions related to their dysfunction.
-== References ==
-. Cassin, B., & Solomon, S. (1990). Dictionary of Eye Terminology. Gainesville, FL: Triad Publishing Company.
-. Kanski, J. J., Bowling, B., & Nischal, K. K. (2011). Clinical Ophthalmology: A Systematic Approach. Edinburgh: Elsevier/Saunders.<br>{{stub}}
-{{dictionary-stub1}}