Abnormal cortical gyration Dysgyria 2019-02-24T17:04:20Z Dysgyria translates as abnormal gyration and can therefore be applied to almost every type of MCD (malformations of cortical development). However, this term was introduced to describe cortical malformations that do not meet classic features of any of the abovementioned well-established MCD types. Dysgyria describes a cortex of variable thickness and an abnormal gyral pattern characterized by abnormalities of sulcal depth or orientation (for example, obliquely oriented sulci directed radially towards the center of the cerebrum and narrow gyri separated by abnormally deep or shallow sulci). In the vast majority of cases, the term dysgyria describes an abnormal non-lissencephaly, non-polymicrogyria cortex within the spectrum of tubulinopathies. An abnormal gyral pattern characterized by abnormalities of sulcal depth or orientation.