Cortical malformations secondary to abnormal neuronal CELL MIGRATION in NEUROGENESIS. This group includes COBBLESTONE LISSENCEPHALY and PERIVENTRICULAR NODULAR HETEROTOPIA.

Synonyms: Neuronal Migration Disorders, Malformations of Cortical Development, Group II, Disorder, Neuronal Migration, Malformations Secondary to Abnormal Neuronal Migration, Disorders, Neuronal Migration, Cortical Malformations, Group II, Migration Disorders, Neuronal, Neuronal Migration Disorder, Malformations Due to Abnormal Neuronal Migration, Migration Disorder, Neuronal