Apraxia and CAS (Childhood Apraxia of Speech)
In order for speech to occur, messages need to go from your brain to your mouth. These messages tell the muscles how and when to move to make sounds. When a child has apraxia of speech, the messages do not get through correctly. The child might not be able to move their lips or tongue in the right ways, even though their muscles are not weak. Sometimes, the child might not be able to say much at all.
A child with CAS knows what they want to say. The problem is not how the child thinks but how the brain tells the mouth muscles to move. (asha.org)
Apraxia can occur in children and adults. It is treatable and should be treated by a specialist. Do not delay in getting this treated...the longer it goes without treatment, the more difficult it is to see results with treatment.