April 2, 2008 | Philip Shaw, Noor J. Kabani, Jason P. Lerch, Kristen Eckstrand, Rhoshel Lenroot, Nitin Gogtay, Deanna Greenstein, Liv Clasen, Alan Evans, Judith L. Rapoport, Jay N. Giedd, and Steve P. Wise
This study investigates the neurodevelopmental trajectories of the human cerebral cortex using longitudinal neuroimaging data from 375 typically developing children and young adults. By analyzing cortical thickness changes across 764 MRI scans, the researchers found that cortical growth patterns align closely with traditional cytoarchitectonic maps. Regions with simpler laminar architecture, such as most limbic areas, show simpler growth trajectories, while more complex areas, like polysensory and high-order association regions, exhibit more complex developmental patterns. These findings suggest an evolutionary significance, as some areas are unique or expanded in primates.
The study used computational neuroanatomy to define cortical thickness at over 40,000 points, revealing that the age at which peak cortical thickness is reached varies across the brain. Primary sensory areas reach peak thickness earlier than higher-order association areas, indicating a heterochronous maturation of the cerebral cortex. The results show that isocortical regions, which have a more complex laminar architecture, develop later than allocortical regions, which have simpler structures.
The study also examined the impact of environmental and genetic factors on cortical development. While socioeconomic status and intelligence were considered, the results showed that the basic link between cytoarchitecture and developmental complexity remained consistent. Genetic factors, such as polymorphisms in genes like ASPM and MCPH1, were also found to influence cortical development.
The findings support the idea that the cerebral cortex develops in concentric rings, with isocortex at the core, allocortex at the periphery, and transitional areas in between. The study highlights the dynamic, heterochronous maturation of the cerebral cortex, with different regions developing at different times. This understanding of cortical development has implications for both normal and clinical populations, providing insights into the complex interplay between genetics, environment, and brain development.This study investigates the neurodevelopmental trajectories of the human cerebral cortex using longitudinal neuroimaging data from 375 typically developing children and young adults. By analyzing cortical thickness changes across 764 MRI scans, the researchers found that cortical growth patterns align closely with traditional cytoarchitectonic maps. Regions with simpler laminar architecture, such as most limbic areas, show simpler growth trajectories, while more complex areas, like polysensory and high-order association regions, exhibit more complex developmental patterns. These findings suggest an evolutionary significance, as some areas are unique or expanded in primates.
The study used computational neuroanatomy to define cortical thickness at over 40,000 points, revealing that the age at which peak cortical thickness is reached varies across the brain. Primary sensory areas reach peak thickness earlier than higher-order association areas, indicating a heterochronous maturation of the cerebral cortex. The results show that isocortical regions, which have a more complex laminar architecture, develop later than allocortical regions, which have simpler structures.
The study also examined the impact of environmental and genetic factors on cortical development. While socioeconomic status and intelligence were considered, the results showed that the basic link between cytoarchitecture and developmental complexity remained consistent. Genetic factors, such as polymorphisms in genes like ASPM and MCPH1, were also found to influence cortical development.
The findings support the idea that the cerebral cortex develops in concentric rings, with isocortex at the core, allocortex at the periphery, and transitional areas in between. The study highlights the dynamic, heterochronous maturation of the cerebral cortex, with different regions developing at different times. This understanding of cortical development has implications for both normal and clinical populations, providing insights into the complex interplay between genetics, environment, and brain development.