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. Any of the speech subsystems (respiration, phonation, resonance, prosody, and articulation) can be affected, leading to impairments in intelligibility, audibility, naturalness, and efficiency of vocal communication.
Symptoms: Dysarthria often is characterized by slurred or slow speech that can be difficult to understand. Common causes of dysarthria include nervous system (neurological) disorders such as stroke, brain injury, brain tumors, and conditions that cause facial paralysis or tongue or throat muscle weakness.
Diagnosis: It is diagnosed by some of the tests such as: 1.Imaging tests. 2.Brain and nerve studies. 3.Blood and urine tests. 4.Lumber puncture. 5.Brain biopsy. 6.Neuropsychological tests.
Treament: More recent techniques based on the principles of motor learning (PML), such as LSVT (Lee Silverman voice treatment) speech therapy and specifically LSVT may improve voice and speech function in PD. Augmentative and alternative communication (AAC) devices that make coping with a dysarthria easier include speech synthesis and text-based telephones.
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.