Marginal sulcus

Last revised by Dr Francis Deng on 02 Aug 2020

The marginal sulcus, also known as pars marginalis or ramus marginalis, is the extension of the cingulate sulcus posterosuperiorly, separating the paracentral lobule from the precuneus of the parietal lobe on the medial surface of the cerebral hemispheres.

Practical point

On axial images it appears as a short sulcus, reaching the apex but not extending laterally. It is an excellent landmark to help confirm the location of the central sulcus, which is located one sulcus anterior to the marginal sulcus, on the other side of the postcentral gyrus (bracket sign).

ADVERTISEMENT: Supporters see fewer/no ads

Cases and figures

  • Figure 1: illustration
    Drag here to reorder.
  • Figure 2: annotated MRI axial
    Drag here to reorder.
  • Figure 3: annotated MRI saggital
    Drag here to reorder.
  • Figure 4: neuroanatomy: medial cortex (diagrams)
    Drag here to reorder.
  • Updating… Please wait.

     Unable to process the form. Check for errors and try again.

     Thank you for updating your details.