In fact, inactivity is a disorder of the individual’s ability to produce voluntary successive movements of the speech organs, such as movements of the tongue, lips, lower jaw, etc. It is a problem of regulation, ie succession, selection and organization of speech movements. (Proiou, 2003: 140)
Although the muscular system itself is not weakened, people with speech inactivity will have difficulty completing sequences of movements for proper production.
It is a disorder in which the person can not coordinate non-verbal movements, however it is not due to weakness and paralysis of the muscles of speech (face, tongue and lips). The severity of the dyspraxia ranges from mild to severe.
The person with oral dyspraxia finds it difficult to make non-verbal movements with the muscles of the larynx (vocal cords), pharynx, tongue, lips, cheeks. Reflex or automated movements are intact but can not make command movements.
It is a disorder in which the person cannot say correctly and consistently what he wants. Nor is it due to weakness and paralysis of the muscles of speech (face, tongue and lips) and its severity also ranges from mild to severe.
The person with speech impairment cannot make verbal gestures. This difficulty can cause sound defects, alterations or replacements. Errors increase as the size or complexity of the word increases. Repetitions of the same word are unstable.
Verbal dyspraxia is a type of imaginary dyspraxia that causes linguistic or phonological difficulty.
(“Oral dyspraxia as a dominant but not mandatory property of verbal dyspraxia” -Crary 1993)