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AUTONOMIC FAILURE IN NEURODEGENERATIVE DISORDERS

Autonomic failure is a frequent feature of two types of neurodegenerative disorders-multiple system atrophy and the Lewy body syndromes, which include Parkinson's disease, pure autonomic failure, and dementia with Lewy bodies. These disorders are known collectively as synucleinopathies because accumulations of the protein α-synuclein are found intracellularly in the brains of affected patients. Other neurodegenerative disorders, including the amyloidopathies or tauopathies (eg, Alzheimer's disease, progressive supranuclear palsy, frontotemporal dementia, sporadic and inherited ataxias, and prion diseases), only rarely entail clinically significant autonomic failure.