Overview of Multiple System Atrophy
Multiple system atrophy (MSA) is a neurodegenerative disease marked by a combination of symptoms affecting movement, blood pressure, and other body functions; hence the label "multiple system" atrophy. The cause of MSA is unknown.
Various Forms of MSA
In Shy-Drager syndrome, the most prominent symptoms are those involving the autonomic system, the body system that regulates blood pressure, urinary function, and other functions not involving conscious control. Striatonigral degeneration causes parkinsonian symptoms such as slowed movements and rigidity, while olivopontocerebellar atrophy principally affects balance, coordination, and speech.
These diseases are now considered forms of MSA.