Supramarginal gyrus
Citation, DOI, disclosures and article data
Citation:
Gai D, Bell D, Cheng J, et al. Supramarginal gyrus. Reference article, Radiopaedia.org (Accessed on 25 Mar 2025) https://doi.org/10.53347/rID-38787
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rID:
38787
Article created:
4 Aug 2015,
Dayu Gai ◉
Disclosures:
At the time the article was created Dayu Gai had no recorded disclosures.
View Dayu Gai's current disclosures
Last revised:
Disclosures:
At the time the article was last revised Daniel J Bell had no recorded disclosures.
View Daniel J Bell's current disclosures
Revisions:
9 times, by
7 contributors -
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Synonyms:
- Supramarginal gyri
The supramarginal gyrus (plural: supramarginal gyri) 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 (i.e. of spoken and written language) and emotional responses.
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Gross anatomy
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.
Arterial supply
The main blood supply is via the middle cerebral artery (MCA).
Variant anatomy
The inferior end of the postcentral gyrus can be partitioned to form an accessory presupramarginal gyrus posteriorly 3.
Related pathology
Damage to the right-sided supramarginal gyrus may result in emotional egocentricity bias.
References
- 1. Hartwigsen G, Baumgaertner A, Price CJ et-al. Phonological decisions require both the left and right supramarginal gyri. Proc. Natl. Acad. Sci. U.S.A. 2010;107 (38): 16494-9. doi:10.1073/pnas.1008121107 - Free text at pubmed - Pubmed citation
- 2. Silani G, Lamm C, Ruff CC et-al. Right supramarginal gyrus is crucial to overcome emotional egocentricity bias in social judgments. J. Neurosci. 2013;33 (39): 15466-76. doi:10.1523/JNEUROSCI.1488-13.2013 - Pubmed citation
- 3. Naidich TP, Castillo M, Cha S et-al. Imaging of the Brain,Expert Radiology Series,1. Saunders. (2012) ISBN:1416050094. Read it at Google Books - Find it at Amazon
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