Supramarginal gyrus

Dr Henry Knipe and Dr Dayu Gai et al.

The supramarginal gyrus is a portion of the parietal lobe of the brain. It is one of the two parts of the inferior parietal lobule, the other being the angular gyrus. It plays a role in phonological processing and emotional responses.

Relations

The supramarginal gyrus is horseshoe-shaped and caps the posterior ascending ramus of the lateral sulcus, lying just anterior to the angular gyrus. Anteriorly it merges with the inferior aspect of the postcentral gyrus.

Its superior margin is somewhat variable, and can either be bounded superiorly by the intraparietal sulcus, or by additional sulci within the inferior parietal lobule

The main blood supply is via the middle cerebral artery.

The inferior end of the postcentral gyrus can be partitioned to form an accessory presupramarginal gyrus posteriorly 3

Damage to the right-sided supramarginal gyrus may result in emotional egocentricity bias. 

Neuroanatomy
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Article Information

rID: 38787
Section: Anatomy
Tag: cases
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Cases and Figures

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    Figure 1: supramarginal gyrus
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    Figure 2: Lateral sulcus
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