Apraxia of Speech

AOS is special acquired kind of Apraxia affecting individual's ability to translate his conscious speech plans into motor plans.
AOS affects volitional movement patterns, however AOS usually also affects automatic speech.
Individuals with AOS have difficulty connecting speech messages from the brain to the mouth.
AOS is a loss of prior speech ability resulting from a brain injury such as a stroke or progressive illness.
AOS involves inconsistent production of speech sounds and rearranging of sounds in a word ("potato" may become "topato" and next "totapo"). Production of words becomes more difficult with effort, but common phrases may sometimes be spoken spontaneously without effort.

Developmental verbal dyspraxia (DVD)= Childhood apraxia of speech (CAS) = Developmental apraxia of speech (DAS)
It is an inability to utilize motor planning to perform movements necessary for speech during a child's language learning process.

Difficulty in speech production esp sequencing and forming sounds.
In three consecutive speech stages (1) Conceptualization (2) Formulation (3) Articulation, AOS involves articulation stage.
It means that he has difficulty in the production of language in an audible manner.
Notably, this difficulty is limited to vocal speech, and does not affect sign-language production.
They knows exactly what they want to say, but there is a disruption in the part of the brain that sends the signal to the muscle for the specific movement.
Hallmark characteristics: Articulation and prosody (Rhythm, Stress or Intonation) errors.

CJD (Under investigation)

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