Roentgenographic Anatomy of the Pericallosal Arteries

Ring, B. Albert; Waddington, Margaret M.

doi:10.2214/ajr.104.1.109

Cited by 35 publications

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ABSTRACT SegmentationVarious authors have used different terms to describe the segments of the ACA (36,64,68). It can be divided into proximal and distal segments, or pre-and postcommunicating segments.

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“…The A5 segment (cortical branches) varies considerably; it is therefore difficult to describe a standard arterial pattern (78). The two basic configurations of the ACA are determined by the presence or absence of the CmA (6, 58,64). The different segments of the ACA are illustrated in Figure 1A, B.…”

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“…The A2 and A3 segments have collectively been referred to as the ascending (or vertical) segment and the A4 and the A5 segments as the horizontal segment (62,64). The ACA have also been divided into a basal (from the origin to the rostrum of the corpus callosum) and a distal part (runs around genu and above corpus callosum) (62).…”

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“…Several authors refer to the A1 segment as the anterior cerebral artery and the artery distal to the AcoA as the pericallosal artery (6, 36, 62,64,68). A few authors have also referred to the A1 and A2 segments as the anterior cerebral artery, and the artery distal to the origin of the callosomarginal artery, the pericallosal artery (62).…”

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“…The CmA is also not always present and therefore it is preferable to classify the pericallosal artery as the segment distal to the AcoA (28,62). The callosomarginal artery has been observed in 40.0% to 93.4% of specimens (6,17,28,34,44,54,62,64,65,68,69,78). The variability of the absence or presence of the CmA can be due to the different definitions used for this artery (65).…”

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Review of the anatomy of the distal anterior cerebral artery and its anomalies

Cilliers

Page²

2015

Turkish Neurosurgery

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SegmentationVarious authors have used different terms to describe the segments of the ACA (36,64,68). It can be divided into proximal and distal segments, or pre-and postcommunicating segments. The pericallosal artery is distal to the A1 segment and consists of several segments that can be divided according to its relationship with the corpus callosum. The A2 segment (also referred to as the infracallosal section) runs vertically █ INTRODUCTION T he cerebral cortex is primarily supplied by the anterior, middle and posterior cerebral arteries. The anatomy of the anterior cerebral artery (ACA) varies considerably and this complicates the description of the ACA and its branches. The segmentation of the ACA is mostly described similarly by different authors, although the relationship of the pericallosal (PrcA) and callosomarginal arteries (CmA) is not agreed upon (78).The anterior cerebral artery (ACA) varies considerably and this complicates the description of the normal anatomy. The segmentation of the ACA is mostly agreed on by different authors, although the relationship of the pericallosal and callosomarginal arteries (CmA) is not agreed upon. The two basic configurations of the ACA are determined by the presence or absence of the CmA.The diameter, length and origin of the cortical branches have been measured and described by various authors and display great variability. Common anomalies of the ACA include the azygos, bihemispheric, and median anterior cerebral arteries.A pilot study was done on 19 hemispheres to assess the variation of the branches of the ACA. The most common variations included absence and duplication. The inferior internal parietal artery and the CmA were most commonly absent and the paracentral lobule artery was the most frequently duplicated (36.8%). The inferior internal parietal artery originated from the posterior cerebral artery in 40.0% and this was the most unusual origin observed.It is important to be aware of the possibility of variations since these variations can have serious clinical implications. The knowledge of these variations can be helpful to clinicians and neurosurgeons. The aim of this article is to review the anatomy and variations of the anterior cerebral artery, as described in the literature. This was also compared to the results from a pilot study.

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