Figure 7.

Multiscale continuum model for cortical and subcortical growth. The cortex, the gray matter, grows morphogenetically at a constant rate G_c. Cortical growth induces subcortical deformation, which triggers subcortical growth. The subcortex, the white matter, grows at a stretchdependent rate as G_s 〈 J^e − J⁰ 〉, where G_s mimics the axon elongation rate and 〈 J^e − J⁰ 〉 activates growth only, if the elastic volume stretch J^e exceeds its baseline value J⁰.