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.
SupplyVascular 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
Normal variantsVariant anatomy
- PCOM duplication - rare
- PCOM fenestration - extremely rare
- foetal origin of posterior cerebral artery - common
- PCOM hyoplasia - incidence ~35%
- PCOM infundibulum
- anterior choroidal artery origin from PCOM
-<p>The <strong>posterior communicating artery (PCOM) </strong>makes up the posterior linkage in the <a href="/articles/circle_of_willis">circle of Willis</a>.</p><h4>Course</h4><p>PCOM originates from the posterior aspect of the C7 (communicating) segment of the <a href="/articles/internal-carotid-artery">internal carotid artery</a> and extends posteriormedially to anastomose with <a href="/articles/posterior-cerebral-artery">posterior communicating artery</a> and form part of the <a href="/articles/circle_of_willis">circle of Willis</a>. </p><h4>Branches</h4><p>PCOM gives off many fine, scarcely visible, perforating branches. The largest perforating branch is called the premamillary (or anterior thalamoperforating) artery. </p><h4>Supply</h4><p>Perforators from the PCOM supply:</p><ul>- +<p>The <strong>posterior communicating artery (PCOM) </strong>makes up the posterior linkage in the <a href="/articles/circle-of-willis">circle of Willis</a>.</p><h4>Gross anatomy</h4><h5>Course</h5><p>PCOM originates from the posterior aspect of the C7 (communicating) segment of the <a href="/articles/internal-carotid-artery">internal carotid artery</a> and extends posteriormedially to anastomose with <a href="/articles/posterior-cerebral-artery">posterior communicating artery</a> and form part of the <a href="/articles/circle-of-willis">circle of Willis</a>. </p><h5>Branches</h5><p>PCOM gives off many fine, scarcely visible, perforating branches. The largest perforating branch is called the premamillary (or anterior thalamoperforating) artery. </p><h4>Vascular territory</h4><p>Perforators from the PCOM supply:</p><ul>
-</ul><h4>Normal variants</h4><ul>- +</ul><h4>Variant anatomy</h4><ul>
Images Changes:
Image 4 DSA (angiography) (Internal carotid artery) ( update )
Caption
was added:
Case 1: PCOM infundibulum
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