It is a motor speech disorder that occurs as a result of the inability to transmit the message from the brain to the speech muscles correctly. This is not due to the inadequacy of the muscles, but to the fact that the brain has problems in moving the speech organs (lips, chin, tongue) required for the act of speaking. Children with apraxia have problems saying sounds, syllables and words. Although the child knows what he means, he has difficulty in expressing himself due to apraxia. Apraxia is a speech disorder that can seriously affect speech intelligibility. While children with apraxia of speech produce speech sounds; they have difficulty in placing their lips, tongue and other speech organs correctly. The intonation of speech is distorted, the errors that occur during the production of sounds and syllables are inconsistent, and the transitions between sounds / syllables are prolonged.
It is a motor speech disorder that controls speech level due to nervous system damage, abnormality in muscle control, speech is affected due to intermuscular coordination disorder, thus limiting speech intelligibility. Dysarthria may occur in degenerative and progressive diseases (Parkinson's, ALS, Multiple Sclerosis) affecting the central and/or peripheral nervous system or in cases such as trauma, tumor, cerebrovascular diseases.