Morphological patterns of the postcentral sulcus in the human brain

The Journal of Comparative Neurology
Veronika Zlatkina, Michael Petrides

Abstract

The morphological structure of the postcentral sulcus and its variability were investigated in 40 structural magnetic resonance images of the human brain registered to the Montreal Neurological Institute (MNI) proportional stereotaxic space. This analysis showed that the postcentral sulcus is not a single sulcus, but rather a complex of sulcal segments separated by gyri, which merge their banks at distinct locations. Most of these gyri are submerged deep within the sulcus and can be observed only by examining the depth of the sulcus, although a small proportion may be observed from the surface of the brain. In the majority of the examined cerebral hemispheres (73.75%), the postcentral sulcus is separated into two or three segments or, less frequently, into four or five segments (12.5%), or it remains continuous (13.75%). Examination of the in-depth relationship between the postcentral sulcus and the intraparietal sulcus revealed that these two sulci may appear to join on the surface of the brain but they are in fact always separated by a gyrus in the cortical depth. In 32.5% of the examined hemispheres, a dorsoventrally oriented sulcus, the transverse postcentral sulcus, is located anterior to the postcentral sulcus on the lowe...Continue Reading

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Citations

Aug 25, 2015·The European Journal of Neuroscience·Veronika ZlatkinaMichael Petrides
Sep 9, 2015·Brain Structure & Function·Z Y SunJ-F Mangin
Apr 6, 2016·Medical Science Monitor : International Medical Journal of Experimental and Clinical Research·Xin HuangUNKNOWN Oculopathy fMRI study group
Nov 2, 2019·Cerebral Cortex·Trisanna Sprung-Much, Michael Petrides
Oct 5, 2019·Brain Topography·Jean-François ManginZhong Yi Sun
Dec 24, 2020·Brain Structure & Function·Nicole EichertMichael Petrides
Jun 6, 2021·NeuroImage·Léonie BorneJean-François Mangin

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