It is a motor speech disorder resulting from neurological injury of the motor component of the motor-speech system and is characterized by poor articulation of phonemes.It can be affected, leading to impairments in intelligibility, audibility, naturalness, and efficiency of vocal communication.
Symptoms: Slurred speech, Slow speech, Inability to speak louder than a whisper or speaking too loudly, Nasal, raspy or strained voice, Uneven speech volume, Difficulty moving your tongue or facial muscles.
Diagnosis: Blood and urine test, Brain Biopsy, Lumbar puncture, Imaging tests.Speech and Language therapy is used to treat dysarthria.
Epidemology: The aetiology is damage or disease of the brain and so it is most common with advancing age. Disease is usually vascular, neoplastic or degenerative. Around 85% of cases arise from strokes and around a third of people who have strokes will have dysphasia. In younger people it is usually a result of head injury.