How Forces Fold the Cerebral Cortex.

Area of Science:

• Neuroscience
• Developmental Biology
• Biophysics

Background:

• Cerebral cortical folding patterns are consistent across species, suggesting a fundamental role in brain function.
• Abnormal folding is linked to neurodevelopmental disorders, highlighting clinical relevance.
• Understanding folding mechanisms is essential for interpreting brain development and disease.

Purpose of the Study:

• To elucidate the biomechanical forces governing cerebral cortical folding.
• To establish a framework for modeling brain growth and folding patterns.
• To identify parameters for biophysical models of developing brain tissue.

Main Methods:

• Modeling brain growth with two coupled zones: an expanding outer cortex and a slower-growing inner white matter.
• Utilizing experimental observations of internal forces in developing brains.
• Employing computational simulations based on the biomechanical framework.

Main Results:

• The proposed model successfully reproduces folding patterns observed in gyroencephalic brains.
• The framework aligns with experimental data on internal forces and physical folding models.
• Identified realistic parameter ranges for biophysical models of brain tissue.

Conclusions:

• Mechanical forces play a critical role in cerebral cortical folding.
• The biomechanical model provides a foundation for understanding brain development and folding.
• Further research into cellular-level origins of mechanical forces is needed for disease interpretation.