The authors sought to examine how language production interacts with speech motor and gross and fine motor skill in children with specific language impairment (SLI), and reported that children with SLI show co-occurring speech motor and generalized motor deficits. The authors noted that current theories do not fully account for the findings in this study, though the procedural deficit hypothesis provides a framework for interpreting overlap among language and motor domains.
DiDonato Brumback, Andrea C. & Goffman, Lisa. (2014). Interaction of Language Processing and Motor Skill in Children With Specific Language Impairment. Journal of Speech, Language, and Hearing Research, 57, 158-171.