Apraxia is a neurological disorder characterized by loss of the ability to execute or carry out learned purposeful movements, despite having the desire and the physical ability to perform the movements. It is a disorder of motor planning which may be acquired or developmental, but may not be caused by incoordination, sensory loss, or failure to comprehend simple commands (which can be tested by asking the person tested to recognize the correct movement from a series). Apraxia should not be confused with aphasia, an inability to produce and/or comprehend language, or abulia, the lack of desire to carry out an action.
The root word of Apraxia is praxis, Greek for an act, work, or deed. It is preceded by a privative a, meaning 'without'.
Apraxia of speech
Childhood Apraxia of Speech (CAS) presents in children who have no evidence of difficulty with strength or range of motion of the articulators, but are unable to execute speech movements because of motor planning and coordination problems. This is not to be confused with phonological impairments in children with normal coordination of the articulators during speech.
Symptoms of Acquired Apraxia of Speech (AOS) and Childhood Apraxia of Speech (CAS) include inconsistent articulatory errors, groping oral movements to locate the correct articulatory position, and increasing errors with increasing word and phrase length. AOS often co-occurs with Oral Apraxia (during both speech and non-speech movements) and Limb Apraxia.
I seem to remember your last post. I hope you get your son to the right doctor and find out exactly what is going on. I will put you on our prayer list at church. God bless.