Posteromedial central arteries
| Posteromedial central arteries | |
|---|---|
 | |
| Details | |
| Source | Posterior cerebral artery, Posterior communicating artery |
| Identifiers | |
| Latin | aa. centrales posteromediales |
| TA98 | A12.2.07.084 |
| TA2 | 4566 |
| Anatomical terminology | |
The posteromedial central arteries or paramedian arteries[1] (also (also posteromedial perforating arteries, or posteromedial ganglionic arteries[2]) are branches of the posterior cerebral artery, and posterior communicating artery. They entering the substance of the brain through the posterior perforated substance. They supply a large portion of the diencephalon as well as some subcortical telencephalic structures.
Anatomy[edit]
Origin[edit]
PMCAs arise from the proximal (pre-communicating (P1)[3]) segment of the posterior cerebral artery,[2][4][3] and along the entire length of[2] the posterior communicating artery[2][5] (though branches arising from the latter may be considered as a distinct anatomical entity[4]).
Course[edit]
They intermingle to form an extensive venous plexus in the interpeduncular fossa[6] before entering the substance of the brain through the posterior perforated substance,[4][6][3] then also passing through the posterior part of the internal capsule along their path.[7]
Distribution[edit]
The PMCAs are distributed to: the globus pallidus, lateral wall of third ventricle,[2][4] parts of the thalamus (partially via the thalamoperforating artery[2]),[2][4][5] subthalamus,[2][4] hypothalamus,[2][3] mammillary bodies,[2][3][5] pituitary gland,[2] optic chiasm and tracts, tuber cinereum,[5] and posterior limb of internal capsule.[3]
The PMCAs supply a substantial part of the diencephalon.[4]
Clinical significance[edit]
Lesions of the PMCAs at the mesencephalic levels often result in Weber's syndrome.[6]
Uncal herniation can cause compression of the paramedian arteries and can result in Duret haemorrhages.[citation needed]
See also[edit]
References[edit]
- ^ "Anatonomina". terminologia-anatomica.org. Retrieved 2024-07-02.
- ^ a b c d e f g h i j k Standring, Susan (2020). Gray's Anatomy: The Anatomical Basis of Clinical Practice (42th ed.). New York: Elsevier. p. 419. ISBN 978-0-7020-7707-4. OCLC 1201341621.
- ^ a b c d e f "posteromedial central arteries of posterior cerebral artery - Dictionnaire médical de l'Académie de Médecine". www.academie-medecine.fr. Retrieved 2024-07-02.
- ^ a b c d e f g Waschke, Jens; Böckers, Tobias M.; Paulsen, Friedrich; Arnold, Wolfgang; Bechmann, Ingo, eds. (2018). Sobotta Anatomy Textbook: English Edition with Latin Nomenclature (1st ed.). München: Elsevier. p. 622. ISBN 978-0-7020-6760-0.
- ^ a b c d "posteromedial central arteries of posterior communicating artery - Dictionnaire médical de l'Académie de Médecine". www.academie-medecine.fr. Retrieved 2024-07-02.
- ^ a b c Carpenter, Malcolm B. (1985). Core text of neuroanatomy (3rd ed.). Baltimore: Williams & Wilkins. p. 409. ISBN 0683014552.
- ^ Sinnatamby, Chummy S. (2011). Last's Anatomy (12th ed.). ISBN 978-0-7295-3752-0.
This article incorporates text in the public domain from the 20th edition of Gray's Anatomy (1918)
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