Gross neuroanatomy measures & introduction to variability References Steinmetz H., Furst, G.,...

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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

description

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 Align extreme points Shift AC PC vertically and side-to-side AC PC AC PC

Transcript of Gross neuroanatomy measures & introduction to variability References Steinmetz H., Furst, G.,...

Page 1: Gross neuroanatomy measures & introduction to variability References Steinmetz H., Furst, G., Freund, H., “Cerebral Cortical Localization: application.

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

Page 2: Gross neuroanatomy measures & introduction to variability References Steinmetz H., Furst, G., Freund, H., “Cerebral Cortical Localization: application.

Talairach transformation&

variability range of main sulci

Page 3: Gross neuroanatomy measures & introduction to variability References Steinmetz H., Furst, G., Freund, H., “Cerebral Cortical Localization: application.

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

Align extreme pointsShift AC PC vertically and side-to-side

AC

PC AC

PC

Page 4: Gross neuroanatomy measures & introduction to variability References Steinmetz H., Furst, G., Freund, H., “Cerebral Cortical Localization: application.

Central Sulcus 20 hemispheres

Sylvian Fissure (R) 15 hemispheres

Sylvian Fissure (L) 15 hemispheres

Calossal, Parietooccipital, Marginal sulci, 30 hemispheres

Leftover variability after Talairach transformation

Page 5: Gross neuroanatomy measures & introduction to variability References Steinmetz H., Furst, G., Freund, H., “Cerebral Cortical Localization: application.

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

Page 6: Gross neuroanatomy measures & introduction to variability References Steinmetz H., Furst, G., Freund, H., “Cerebral Cortical Localization: application.

Incidence rates of main sulci

Page 7: Gross neuroanatomy measures & introduction to variability References Steinmetz H., Furst, G., Freund, H., “Cerebral Cortical Localization: application.

Method

• 25 postmortem brains

• Length determined by running a chord inside sulci

• Molded silicon models are developed to study internals of the sulci

Page 8: Gross neuroanatomy measures & introduction to variability References Steinmetz H., Furst, G., Freund, H., “Cerebral Cortical Localization: application.

Statistics

Page 9: Gross neuroanatomy measures & introduction to variability References Steinmetz H., Furst, G., Freund, H., “Cerebral Cortical Localization: application.

Statistics