There is little data on the prevalence of Apraxia, but diagnosis numbers are on the rise presumably because:
Increased awareness of CAS by professionals and families
Increased availability of research on CAS
Earlier-age evaluation and identification
(National Institute of Health)
Potential Causes
The cause or causes of DAS are not yet known. Scientists theorize that it is related to a child’s overall language development or a neurological disorder that affects the brain’s ability to send the proper signals to move the muscles involved in speech. However, brain imaging and other studies have not found evidence of specific brain lesions or differences in brain structure in children with DAS. Children with DAS often have family members who have a history of communication disorders or learning disabilities which suggests that genetic factors may play a role in the disorder. (National Institute of Health)