Symptom Clusters
MSA symptoms can differ in severity and are primarily influenced by the specific area of the brain that is affected. The condition can be classified into three main symptom clusters: cerebellar, Parkinsonian, and autonomic. In the past, these clusters were regarded as separate conditions known as Shy-Drager syndrome, striatonigral degeneration, and sporadic olivopontocerebellar atrophy. However, experts now acknowledge them as distinct presentations of MSA.
Cerebellar Symptom Cluster
Approximately 20% of individuals diagnosed with multiple system atrophy (MSA) exhibit cerebellar degeneration. This specific type of MSA affects the cerebellum, the region of the brain responsible for coordinating body movements and maintaining balance. Consequently, those affected by cerebellar MSA commonly experience: