Average thickness of gyral and sulcal regions in cerebral cortex

Range gyri 2.7±0.3 sulci 2.2±0.3 mm
Organism Human Homo sapiens
Reference Fischl B, Dale AM. Measuring the thickness of the human cerebral cortex from magnetic resonance images. Proc Natl Acad Sci U S A. 2000 Sep 26 97(20):11050-5. p.11052 right column 2nd paragraphPubMed ID10984517
Method "[Researchers] computed the thickness of the cortical gray matter for the left hemisphere of 30 subjects (17 male and 13 female, ages 20–37 years old)."
Comments "[Researchers] find that gyral regions have an average thickness of 2.7±0.3 mm, versus 2.2±0.3 mm for sulcal regions...Across the 30 subjects, [they] find that approximately 90% of the cortex consistently maps gyral/sulcal patterns across individuals. That is, a patch of cortex that is clearly gyral (or sulcal) in one individual has a 90% chance of mapping to a gyral (or sulcal) patch in any other individual. Note that 100% alignment is not possible because of the fact that the topology of the folding patterns varies substantially across individuals, and thus no continuous bijection exists."
Entered by Uri M
ID 110099