title: MRI in autonomic failure.
abstract: A significant rank correlation between rigidity and putaminal signal dropout on magnetic resonance imaging (MRI) in patients with multiple system atrophy suggests that putaminal degeneration may cause this clinical finding. Absence of putaminal abnormalities on MRI in patients with pure autonomic failure may prove useful in differentiating these two autonomic disorders.
mesh_terms: D000368:Aged; D001342:Autonomic Nervous System Diseases / Q000150:complications / Q000175:diagnosis* / Q000473:pathology; D006801:Humans; D009682:Magnetic Resonance Spectroscopy; D008875:Middle Aged; D009410:Nerve Degeneration; D010300:Parkinson Disease / Q000150:complications / Q000473:pathology; D011699:Putamen / Q000473:pathology*