posterior communicating artery


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pos·te·ri·or com·mu·ni·cat·ing ar·ter·y

[TA]
origin, internal carotid; distribution, optic tract, crus cerebri, interpeduncular region, and hippocampal gyrus; anastomoses, with posterior cerebral to form a portion of the cerebral arterial circle (circle of Willis).

pos·te·ri·or com·mu·ni·cat·ing ar·te·ry

(pos-tēr'ē-ŏr kŏ-myū'ni-kā'ting ahr'tĕr-ē) [TA]
Origin, internal carotid; distribution, optic tract, crus cerebri, interpeduncular region, and hippocampal gyrus; anastomoses with posterior cerebral to form the cerebral arterial circle (circle of Willis).
Synonym(s): arteria communicans posterior.

posterior communicating artery

An artery interconnecting the posterior cerebral and middle cerebral arteries at the base of the brain.
See: brain (Major arteries of the brain) and circle of Willis for illus.
See also: artery
References in periodicals archive ?
Symptomatic aneurysms are those causing subarachnoid haemorrhage following rupture, or exerting symptoms by a space-occupying effect (oculomotor nerve palsy is a presenting feature in 20% of patients with posterior communicating artery aneurysms).
It is a disorder of motor planning, and in our patient secondary to a posterior communicating artery aneurysm.
Just under half of the aneurysms treated were posterior communicating artery aneurysms, not because we selected them to coil but because they seem to have a high incidence in our population.
Three other patients in our series haemorrhaged: one was transferred to us with a basilar tip aneurysm and bled the night she arrived in the intensive care unit; another had a dissection of the internal carotid artery while her posterior communicating artery aneurysm was being treated with Onyx, which we no longer use for aneurysms; and the third patient was referred to us with what had been considered an unclippable posterior communicating artery aneurysm, which we were able to coil with a satisfactory result of between 95% and 99% occlusion.
DSA demonstrated occlusion of the right vertebral artery, occlusion of the left vertebral artery proximal to the posterior inferior cerebellar artery (PICA), reconstitution of the vertebrobasilar confluence distal to the PICA, and occlusion of the remainder of the basilar artery with filling of the basilar tip via the posterior communicating artery.

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