Posterior communicating artery
Updates to Article Attributes
Body
was changed:
The posterior communicating artery (PCOM) makes up the posterior linkage in the circle of Willis.
Gross anatomy
Course
PCOM originates from the posterior aspect of the C7 (communicating) segment of the internal carotid artery and extends posteriormedially to anastomose with posterior communicating artery and form part of the circle of Willis.
Branches
PCOM gives off many fine, scarcely visible, perforating branches. The largest perforating branch is called the premamillary (or anterior thalamoperforating) artery.
Vascular territory
Perforators from the PCOM supply:
- posterior part of the optic chiasm and optic tract
- posterior part of the hypothalamus and mamillary body
- part of the thalamus
Variant anatomy
- PCOM duplication
-: rare - PCOM fenestration
-: extremely rare -
foetal origin of posterior cerebral artery
- common: common - PCOM hyoplasia
-: incidence ~35% - PCOM infundibulum
- anterior choroidal artery origin from PCOM
-<li>PCOM duplication - rare</li>-<li>PCOM fenestration - extremely rare</li>- +<li>PCOM duplication: rare</li>
- +<li>PCOM fenestration: extremely rare</li>
-<a href="/articles/fetal-pcom-1">foetal origin of posterior cerebral artery</a> - common</li>-<li>PCOM hyoplasia - incidence ~35%</li>- +<a href="/articles/fetal-pcom-1">foetal origin of posterior cerebral artery</a>: common</li>
- +<li>PCOM hyoplasia: incidence ~35%</li>
References changed:
- 1. Krayenbuehl H, Yasargil MG. Cerebral Angiography. Thieme. (1982) ISBN:0865770670. <a href="http://books.google.com/books?vid=ISBN0865770670">Read it at Google Books</a> - <a href="http://www.amazon.com/gp/product/0865770670">Find it at Amazon</a><span class="ref_v3"></span>
- 4. Bogousslavsky J, Caplan LR. Stroke Syndromes. Cambridge University Press. (2001) ISBN:0521771420. <a href="http://books.google.com/books?vid=ISBN0521771420">Read it at Google Books</a> - <a href="http://www.amazon.com/gp/product/0521771420">Find it at Amazon</a><span class="ref_v3"></span>
- 2. Dimmick SJ, Faulder KC. Normal variants of the cerebral circulation at multidetector CT angiography. Radiographics. 2009;29 (4): 1027-43. <a href="http://radiographics.rsna.org/content/29/4/1027.full">Radiographics (full text)</a> - <a href="http://dx.doi.org/10.1148/rg.294085730">doi:10.1148/rg.294085730</a> - <a href="http://www.ncbi.nlm.nih.gov/pubmed/19605654">Pubmed citation</a><span class="ref_v3"></span>
- 3. Jinkins JR. Atlas of Neuroradiologic Embryology, Anatomy, and Variants. Lippincott Williams & Wilkins. (2000) ISBN:0781716527. <a href="http://books.google.com/books?vid=ISBN0781716527">Read it at Google Books</a> - <a href="http://www.amazon.com/gp/product/0781716527">Find it at Amazon</a><span class="ref_v3"></span>
- Krayenbuehl H, Yasargil MG. Cerebral Angiography. Thieme. (1982) ISBN:0865770670. <a href="http://books.google.com/books?vid=ISBN0865770670">Read it at Google Books</a> - <a href="http://www.amazon.com/gp/product/0865770670">Find it at Amazon</a><span class="ref_v3"></span>
- Bogousslavsky J, Caplan LR. Stroke Syndromes. Cambridge University Press. (2001) ISBN:0521771420. <a href="http://books.google.com/books?vid=ISBN0521771420">Read it at Google Books</a> - <a href="http://www.amazon.com/gp/product/0521771420">Find it at Amazon</a><span class="ref_v3"></span>
- Dimmick SJ, Faulder KC. Normal variants of the cerebral circulation at multidetector CT angiography. Radiographics. 2009;29 (4): 1027-43. <a href="http://radiographics.rsna.org/content/29/4/1027.full">Radiographics (full text)</a> - <a href="http://dx.doi.org/10.1148/rg.294085730">doi:10.1148/rg.294085730</a> - <a href="http://www.ncbi.nlm.nih.gov/pubmed/19605654">Pubmed citation</a><span class="ref_v3"></span>
- Jinkins JR. Atlas of Neuroradiologic Embryology, Anatomy, and Variants. Lippincott Williams & Wilkins. (2000) ISBN:0781716527. <a href="http://books.google.com/books?vid=ISBN0781716527">Read it at Google Books</a> - <a href="http://www.amazon.com/gp/product/0781716527">Find it at Amazon</a><span class="ref_v3"></span>
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