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Gross neuroanatomy measures & introduction to variability. References Steinmetz H., Furst, G., Freund, H., “Cerebral Cortical Localization: application and validation of the proportional grid system in MR Imaging”, 1989, Journal of Computer Assisted Tomography, 13(1):10-19
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Gross neuroanatomy measures &introduction to variability References Steinmetz H., Furst, G., Freund, H., “Cerebral Cortical Localization: application and validation of the proportional grid system in MR Imaging”, 1989, Journal of Computer Assisted Tomography, 13(1):10-19 Ono M., Kubik S., Abernathey C.D., Atlas of the cerebral sulci, 1990, Thieme Verlag
Method • Tomographic images are collected on 30 hemispheres of 15 people (22-63 yo) • Talairach transformation is performed using 4 AC PC and 5 extreme landmarks • Sulci are identified manually and projected sagitally Shift AC PC vertically and side-to-side Align extreme points AC AC PC PC
Leftover variability after Talairach transformation Calossal, Parietooccipital, Marginal sulci, 30 hemispheres Central Sulcus 20 hemispheres Sylvian Fissure (L) 15 hemispheres Sylvian Fissure (R) 15 hemispheres
Summary • Central sulcus (CS) in the postmortem Talairach brain is located 0.5-1.0 cm anterior to the CS in the 30 hemispheres studied here • 2-3 cm displacement is observed in most of the studied major sulci
Method • 25 postmortem brains • Length determined by running a chord inside sulci • Molded silicon models are developed to study internals of the sulci