LSVT LOUD® is an effective speech treatment for individuals with Parkinson disease (PD) and other neurological conditions. LSVT LOUD, named for Mrs. Lee Silverman (Lee Silverman Voice Treatment – LSVT) was developed in 1987 and has been scientifically studied for nearly 20 years with funding support from the National Institute for Deafness and other Communication Disorders (NIDCD) of the National Institutes of Health. Published research data support improvements in vocal loudness, intonation, and voice quality for individuals with PD who received LSVT LOUD, with improvements maintained up to two years after treatment. Recent research studies have also documented the effectiveness of this therapy in improving the common problems of disordered articulation, diminished facial expression and impaired swallowing. Additionally, two brain imaging studies have documented evidence of positive changes in the brain following administration of the therapy.
LSVT LOUD improves vocal loudness by stimulating the muscles of the voice box (larynx) and speech mechanism through a systematic hierarchy of exercises. Focused on a single goal “speak LOUD!” – the treatment improves respiratory, laryngeal and articulatory function to maximize speech intelligibility. The treatment does not train people for shouting or yelling; rather, LSVT LOUD uses loudness training to bring the voice to an improved, healthy vocal loudness with no strain.
Treatment is administered in 16 sessions over a single month (four individual 60 minute sessions per week). This intensive mode of administration is consistent with theories of motor leaning and skill acquisition, as well as with principles of neural plasticity (the capacity of the nervous system to change in response to signals), and is critical to attaining optimal results. The treatment not only simulates the motor system but also incorporates sensory awareness training to help individuals with PD recognize that their voice is too soft, convincing them that the louder voice is within normal limits, and making them comfortable with their new louder voice.
Patients are trained to self-generate the adequate amount of loudness to make their speech understood. While LSVT LOUD has been successfully administered to individuals in all stages of PD, the treatment has been most effective among those who are in early or middle stages of the condition. LSVT LOUD has also been applied to individuals with sub-types of PD (Shy-Drager syndrome, multi-system atrophy and progressive supranuclear palsy), however the largest dataset is for individuals with Idiopathic Parkinson disease (IPD). Recently, LSVT LOUD has been applied to select individuals with stroke, multiple sclerosis, Down syndrome, and cerebral palsy with positive outcomes.