It is characterized by overfolding of the cerebral cortex and abnormal cortical layering.
[ncbi.nlm.nih.gov]
[…] by excessive cortical folding and abnormal cortical layering that, depending on its topographic distribution, presents with variable combinations of neurological symptoms
[orpha.net]
This disorder is derived from a malformation in cortical development characterized by many small gyri, shallow sulci, and abnormal cortical layering.
[pediatricfocus.wordpress.com]