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pericallosal_artery

Pericallosal artery

jtsciencevisuals.com_content_portfolio_9d8e0c7e-dc90-4835-8b23-6927e57f9473.fit-800x600.jpeg The pericallosal artery is the continuation of the anterior cerebral artery (ACA) and is named after the origin of the callosomarginal artery. As it courses over the superior surface of the corpus callosum (CC) in the pericallosal cistern it gives off many small branches to the CC, forming the pericallosal pial plexus (pericallosal moustache).

The segment of the anterior cerebral artery distal to the anterior communicating artery (A2 to A5) has also been called the pericallosal artery. The two first conical branches of the ACerA supplying the medial surface, the orbitofrontal and the frontopolar arteries, usually arise from the A2 segment. The segments A3 to A5 give rise to other cortical branches to supply the medial surface of the hemisphere.

A3 segment

The A3 segment is a frequent site of origin for the anterior, middle internal frontal, and callosomarginal arteries.

A4 segment

The paracentral artery frequently stems from the A4 segment.

A5 segment

The A5 segment gives rise to the superior and inferior parietal arteries. All the cortical branches arise more frequently from the pericallosal than from the callosomarginal artery.

The pericallosal arteries are sonographically visible since the first trimester in 3D ultrasound scans of fetuses found to have a normal corpus callosum at follow-up 1).

The PA can routinely be observed at the first-trimester evaluation with color Doppler ultrasonography using the mid-sagittal view of the fetal head. The presence of an abnormal vascular map of the PA by Doppler ultrasonography at 11-14 weeks raises the suspicion of Agenesis of the corpus callosum 2).

The use of 3-D power Doppler sonoangiography enables the precise demonstration of the normal variants of the fetal pericallosal artery with different origins of the callosomarginal artery. The knowledge of normal variants helps to detect pathological forms of the pericallosal artery 3).

see pericallosal artery aneurysm

1)
Conturso R, Contro E, Bellussi F, Youssef A, Pacella G, Martelli F, Rizzo N, Pilu G, Ghi T. Demonstration of the Pericallosal Artery at 11-13 Weeks of Gestation Using 3D Ultrasound. Fetal Diagn Ther. 2014 Nov 1. [Epub ahead of print] PubMed PMID: 25376870.
2)
Díaz-Guerrero L, Giugni-Chalbaud G, Sosa-Olavarría A. Assessment of pericallosal arteries by color Doppler ultrasonography at 11-14 weeks: an early marker of fetal corpus callosum development in normal fetuses and agenesis in cases with chromosomal anomalies. Fetal Diagn Ther. 2013;34(2):85-9. doi: 10.1159/000351657. Epub 2013 Jun 17. PubMed PMID: 23774062.
3)
Pashaj S, Merz E. Prenatal demonstration of normal variants of the pericallosal artery by 3D ultrasound. Ultraschall Med. 2014 Apr;35(2):129-36. doi: 10.1055/s-0033-1355576. Epub 2013 Dec 20. PubMed PMID: 24363241.
pericallosal_artery.txt · Last modified: 2015/11/30 15:18 (external edit)