UK Cortical Malformation Research
A research group at the MRC Centre for Neuropsychiatric Genetics and Genomics in Cardiff, UK, have a project looking into the genetic causes of cortical malformations (including pachygyria, but also lissencephaly, polymicrogyria and grey matter heterotopias):
http://medicine.cf.ac.uk/en/research/research-groups/cngg/participate-research/gldecm/
People can get in contact if they would like more information or to enquire about participation (contact details on website).