WordNet

a highly vascular membrane in the eye between the retina and the sclera; a dark pigmentation minimizes the scattering of light inside the eye (同)choroid coat

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出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2017/09/06 08:01:52」(JST)

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The tela choroidea (or tela chorioidea) is a region of meningeal pia mater and underlying ependyma that gives rise to the choroid plexus in each of the brain’s four ventricles.^[1] Tela is Latin for woven and is used to describe a web-like membrane or layer.^[2] The tela choroidea is a very thin part of the loose connective tissue of pia mater that overlies and closely adheres to the ependyma^[1] with no intervening tissue. It has a rich blood supply. The ependyma and vascular pia mater that make up the tela choroidea form regions of minute projections known as a choroid plexus that projects into each ventricle.^[3] The choroid plexus produces the cerebrospinal fluid of the ventricular system.^[1] The tela choroidea in the ventricles forms from different parts of the roof plate in the development of the embryo.^[1]^[3]

Location

Ventricles of the brain

In the lateral ventricles the tela choroidea–a double-layered fold of pia mater and ependyma, produces the choroid fissure (also known as the choroidal fissure). The choroid fissure is C-shaped, runs between the fornix and the thalamus in the body of the ventricle, and between the stria terminalis and hippocampal fimbria in the inferior horn, and is the location of the attachment of the margins of the choroid plexus.^[4]^[5] In the choroid fissure of the lateral ventricles, the tela choroidea is a lateral extension of the tela choroidea from the third ventricle.^[6]

In the third ventricle the tela choroidea forms the roof of the ventricle. Two vascular fringes from the lower fold invaginate the roof and form the choroid plexus.^[6]

The tela choroidea of the fourth ventricle (also known as the triangular lamella)^[7] is a double layer of pia mater and ependyma, between the cerebellum and the lower part of the roof of the fourth ventricle. The two layers are continuous with each other in front, and are mostly adherent throughout. The anterior layer of the fold, contains vascular fringes which make up the choroid plexus.^[6] The anterior layer is continuous inferiorly with the pia mater on the inferior cerebellar peduncles and the closed part of the medulla oblongata.

The posterior layer covers the antero-inferior surface of the cerebellum.

Blood supply

The blood supply of these plexus is from the posterior inferior cerebellar artery. The lateral ventricles also contains the right and left internal cerebral veins (which drain the choroid plexuses) at its roof (the two veins unite to form the great cerebral vein).^{[citation needed]}

The arteries carrying blood into the choroid plexuses are:^{[citation needed]}

the anterior choroidal artery (branch from the internal carotid).
the posterior choroidal artery (branch from the posterior cerebral artery).

Medial posterior choroidal branches run forward beneath the splenium of the corpus callosum, and supply the tela chorioidea of the third ventricle and the choroid plexus.

Images

Tela choroidea

References

^ ^a ^b ^c ^d Larsen, William J. (2001). Human embryology (3rd ed.). Philadelphia, Pa.: Churchill Livingstone. p. 424. ISBN 0-443-06583-7.
^ Alberts, Daniel (2012). Dorland's illustrated medical dictionary. (32nd ed. ed.). Philadelphia, PA: Saunders/Elsevier. p. 1878. ISBN 978-1-4160-6257-8. CS1 maint: Extra text (link)
^ ^a ^b Sadler, T. (2010). Langman's medical embryology. (11th ed. ed.). Philadelphia: Lippincott William & Wilkins. p. 305. ISBN 978-0-7817-9069-7. CS1 maint: Extra text (link)
^ Zemmoura, I. (2012). "The choroidal fissure: anatomy and surgical implications". Advances and Technical Standards in Neurosurgery. Springer, Vienna. pp. 97–113. doi:10.1007/978-3-7091-0676-1_5.
^ "choroidal fissure - Definition". www.mondofacto.com.
^ ^a ^b ^c Alberts, Daniel (2012). Dorland's illustrated medical dictionary. (32nd ed. ed.). Philadelphia, PA: Saunders/Elsevier. p. 1878. ISBN 978-1-4160-6257-8. CS1 maint: Extra text (link)
^ Alberts, Daniel (2012). Dorland's illustrated medical dictionary. (32nd ed. ed.). Philadelphia, PA: Saunders/Elsevier. p. 910. ISBN 978-1-4160-6257-8. CS1 maint: Extra text (link)

UpToDate Contents

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1. 神経管欠損および脳室拡大を除く中枢神経系異常の出生前診断 prenatal diagnosis of cns anomalies other than neural tube defects and ventriculomegaly

English Journal

Surgical approaches to IV ventricle--anatomical study.

Mussi AC1, Matushita H2, Andrade FG3, Rhoton AL1.
Child's nervous system : ChNS : official journal of the International Society for Pediatric Neurosurgery.Childs Nerv Syst.2015 Oct;31(10):1807-14. doi: 10.1007/s00381-015-2809-0. Epub 2015 Sep 9.
PURPOSE: Knowledge of anatomy of the IV ventricle is basic to surgical approach of any kind of lesion in its compartment as well as for those located in its neighborhood. The purpose of this study is to demonstrate the surgical approach options for the IV ventricle, based on the step by step dissect
PMID 26351232

Delayed Diagnosis of Enhancing Posterior Fossa Tumors Mimicking the Tela Choroidea of the Fourth Ventricle.

Gabel BC1, Levy ML2, Crawford JR3.
World neurosurgery.World Neurosurg.2015 Sep;84(3):865.e1-5. doi: 10.1016/j.wneu.2015.03.054. Epub 2015 Apr 1.
BACKGROUND: Posterior fossa brain tumors are common in children. Symptoms typically develop when the tumors have reached sufficient size to cause compression of adjacent neural structures or cause obstructive hydrocephalus. Many tumors in this region originate from the tela choroidea and choroid ple
PMID 25839397

Purely endoscopic resection of a choroid plexus papilloma of the third ventricle: case report.

Santos MM1, Souweidane MM1.
Journal of neurosurgery. Pediatrics.J Neurosurg Pediatr.2015 Jul;16(1):54-7. doi: 10.3171/2014.12.PEDS14287. Epub 2015 Apr 10.
The authors report an illustrative case of a purely endoscopic surgical approach to successfully remove a solid choroid plexus papilloma of the third ventricle in an infant. A 10-week-old male infant first presented with transient episodes of forced downward gaze, divergent macrocephaly, a tense ant
PMID 25860986

Japanese Journal

第四脳室と橋・延髄の解剖と外科治療(<特集>脳室・脳幹病変の外科治療)

斉藤延人,金太一
脳神経外科ジャーナル 20(6), 438-445, 2011-06-20
第四脳室と橋・延髄下半分の病変には,髄芽腫,脳室上衣腫,星細胞腫,脈絡叢乳頭腫,脳幹海綿状血管腫,血管芽腫,外向発育性グリオーマなどがある.第四脳室を露出するには小脳延髄裂アプローチが有用である.小脳扁桃の裏で延髄に付着している脈絡膜と脈絡紐を切開して小脳扁桃を牽引する方法である.脳幹内部へは,病変が最も表面に近い部分から進入するのが基本である.第四脳室底には正中溝,閂,第四脳室線条,外側陥凹,顔 …
NAID 110008662231

Related Pictures

★リンクテーブル★

リンク元

「脈絡組織」

Tela choroidea
	Tela choroidea and choroid plexus
	Anatomical terms of neuroanatomy [edit on Wikidata]

　　[★]

英: tela choroidea (KH), choroid tissue (KL)
関: 脈絡叢

第4の脳室の天井を作る膜で、軟膜と上衣からなる。

[Larsen-1] Larsen, William J. (2001). Human embryology (3rd ed.). Philadelphia, Pa.: Churchill Livingstone. p. 424. ISBN 0-443-06583-7.

[2] Alberts, Daniel (2012). Dorland's illustrated medical dictionary. (32nd ed. ed.). Philadelphia, PA: Saunders/Elsevier. p. 1878. ISBN 978-1-4160-6257-8. CS1 maint: Extra text (link)

[Langmans-3] Sadler, T. (2010). Langman's medical embryology. (11th ed. ed.). Philadelphia: Lippincott William & Wilkins. p. 305. ISBN 978-0-7817-9069-7. CS1 maint: Extra text (link)

[Zemmoura-4] Zemmoura, I. (2012). "The choroidal fissure: anatomy and surgical implications". Advances and Technical Standards in Neurosurgery. Springer, Vienna. pp. 97–113. doi:10.1007/978-3-7091-0676-1_5.

[5] "choroidal fissure - Definition". www.mondofacto.com.

[Dorlands-6] Alberts, Daniel (2012). Dorland's illustrated medical dictionary. (32nd ed. ed.). Philadelphia, PA: Saunders/Elsevier. p. 1878. ISBN 978-1-4160-6257-8. CS1 maint: Extra text (link)

[7] Alberts, Daniel (2012). Dorland's illustrated medical dictionary. (32nd ed. ed.). Philadelphia, PA: Saunders/Elsevier. p. 910. ISBN 978-1-4160-6257-8. CS1 maint: Extra text (link)

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tela choroidea