Location of the central sulcus via cortical thickness of the precentral and postcentral gyri on MR

Joel R. Meyer*, Sudipta Roychowdhury, Eric J. Russell, Cathy Callahan, Darren Gitelman, M. Marsel Mesulam

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

62 Scopus citations

Abstract

PURPOSE: To determine whether relative cortical thickness measurements of the precentral and postcentral gyri can be used to differentiate the central sulcus from adjacent cortical sulci. METHODS: Turbo inversion- recovery MR imaging of the entire brain was done with scans parallel to the anterior commissure posterior commissure line. Cortical thickness was measured in each hemisphere with a jeweler's eyepiece with 0.1-mm gradations. Three measurements were obtained perpendicular to the central, precentral, and superior frontal sulci, as determined by means of established anatomic methods. The ratios of cortical thickness on both sides of the central, precentral, and superior frontal sulci were calculated and compared. RESULTS: The mean ratio of precentral/postcentral gyri was 1.64 for the right hemisphere and 1.53 for the left hemisphere. The mean cortical thickness ratios were as follows: 1.01 for the right hemisphere and 1.01 for the left hemisphere across the precentral sulcus, and 1.03 for the right hemisphere and 0.99 for the left hemisphere across the superior frontal sulcus. CONCLUSION: Cortical thickness measurements across the central sulcus provide a method for locating the primary motor (precentral gyri) and primary somatosensory (postcentral gyri) cortices. The higher mean cortical thickness ratio across the central sulcus corresponds with known cytoarchitectonic relationships.

Original languageEnglish (US)
Pages (from-to)1699-1706
Number of pages8
JournalAmerican Journal of Neuroradiology
Volume17
Issue number9
StatePublished - Oct 1 1996

Keywords

  • Brain, anatomy
  • Brain, gyri
  • Brain, magnetic resonance

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging
  • Clinical Neurology

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