posterior cerebral artery

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Related to Posterior cerebral: Posterior communicating

pos·te·ri·or ce·re·bral ar·ter·y

formed by the bifurcation of the basilar artery; it passes around the cerebral peduncle to reach the medial aspect of the hemisphere. For descriptive purposes it is divided into three parts, consisting of four segments: 1) precommunicating part (P1 segment of clinical terminology), which gives rise to posteromedial central arteries [TA], short circumferential arteries [TA], the thalamoperforating artery [TA], and the collicular artery [TA]; 2) the postcommunicating part (P2), which gives rise to posterolateral central arteries [TA], posterior medial choroidal branches [TA], posterior lateral choroidal branches [TA], peduncular branches [TA], and the thalamogeniculate artery [TA]; and 3) the terminal or cortical part consisting of the lateral occipital artery [TA] (P3) the branches of which serve the medial aspect of the temporal lobe and the medial occipital artery [TA] (P4), with branches that serve the medial surface of the occipital lobe; the latter includes calcarine and parietooccipital arteries.
Synonym(s): arteria cerebri posterior [TA]

pos·te·ri·or ce·re·bral ar·te·ry

(pos-tēr'ē-ŏr ser'ĕ-brăl ahr'tĕr-ē) [TA]
Formed by bifurcation of the basilar artery; it passes around the cerebral peduncle to reach the medial aspect of the hemisphere.
Synonym(s): arteria cerebri posterior.

posterior cerebral artery

The end branch of the basilar artery; it runs around the sides of the midbrain, through the tentorium cerebelli, and along the temporal and occipital lobes to end in the calcarine fissure (the primary visual cortex). Its branches supply blood to the posterior hypothalamus, subthalamus, the choroid plexus of the third ventricle, the internal capsule, the ventral (inferior) surfaces of the temporal and occipital lobes, and parts of the thalamus and the midbrain. The posterior cerebral artery anastomoses with the circle of Willis via the posterior communicating artery.
See: brain (Major arteries of the brain) and circle of Willis for illus.
See also: artery
References in periodicals archive ?
Here, we present a rare case involving an intriguing posterior cerebral artery (PCA) lesion that was difficult to detect due to the superimposition of other vascular lesions.
Within the SNc, the pathology is more pronounced in the caudal and the lateral portion (Hassler, 1938; Jellinger, 1986), in the vascularized portion by perforating arteries originating from the vascular territory of the perforating branches that originate from the basilar bifurcation and posterior cerebral artery, mesenphalic arteries.
The reason that the findings are mostly observed in the posterior hemispheres is the fact that sympathetic innervation which provides autoregulation in cases of increased blood pressure is found less in the posterior cerebral vessels (6).
7 The occipital lobe, supplied mainly by the posterior cerebral artery naturally will suffer the most in aplasia or hypoplasia of PCA, as this will not take place when vertebro-basilar or carotid arterial system develops a blockage or a narrowing.
Vascular syndromes involving the posterior cerebral artery characteristically involve a contralateral visual field deficit.
2 mm) was recorded compared to the female population and higher values of the P1 segment of the posterior cerebral artery, while the rear communicating artery in females was 0.
RPLS symptoms include headache, seizures, confusion, and visual changes with characteristic neuroimaging findings of posterior cerebral white matter edema.
In addition, multiple focal areas of narrowing affecting bilateral anterior, middle and posterior cerebral arteries indicated possible vasculitis.
9%) followed by posterior cerebral artery 13%, brainstem 13%, anterior cerebral artery lesion in 11.
Its predilection for the posterior cerebral region is thought to be due to a deficiency in autoregulation owing to a paucity of sympathetic innervation to the posterior vasculature.
A well-defined midline pouch was demonstrated in the posterior fossa, communicating with the left posterior cerebral artery.
All patients underwent ultrasonic and dopplerography of brachycephalic trunk examination (UDBT) of common carotid artery (CCA), internal carotid artery (ICA) and supratrochlear artery, including transcranial dopplerography examination (as well as study of hemodynamic of medium cerebral artery (MCA), anterior cerebral artery (ACA) and posterior cerebral artery (PCA) by using "LOGIDOP-4" device (made by "Kransbuchler", Germany) equipped with 2.

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