The circular sulcus is the deep groove that outlines the insula, separating it from the overlying opercula on its front, top and bottom edges.
| Location | Margin of the insula, deep within the lateral sulcus |
|---|---|
| Parts |
|
| Connections |
|
| Blood Supply | Middle cerebral artery (insular branches) |
Marks the boundary of the insular cortex.
It is a key surgical landmark in removing insular tumours (gliomas), helping surgeons judge the limits of resection and avoid the internal capsule beneath.
A tumour of the insula whose removal depends on landmarks such as the circular sulcus.
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