The overlap of neuropsychiatric illness and developmental disability continues to be prominently recognized in clinical practice and in the academic literature. Theoretical and practical considerations may represent a frontier for understanding brain and behavior relationships. The purpose of this review is to explore this common relationship and report on recent literature that helps advance the larger fields of psychiatry and neurology.: . SSSFT staff can use the OVID link, or you can request a copy of this article by replying to this email. Please ensure you are clear which article you are requesting.