Sphincter EMG for Diagnosing Multiple System Atrophy and Related Disorders

External Anal- and Urethral-Sphincter Electromyography for Differentiating MSA-P, PD and PSP: Using a Needle to Sort the Haystack!

“…[ 14 15 ] Moreover, EAS-EMG abnormalities in MSA may become more evident as the disease progresses, with Sakakibara reporting it in 52% patients in the first year of diagnosis and 83% MSA patients by fifth year of diagnosis. [ 16 ] Recently, Todisco et al . [ 17 ] has explored the prognostic significance of EAS- EMG alterations in MSA and its co-relation with prevalence of bowel/bladder symptoms and poor outcome.…”

“…Although uncommon, abnormal sphincter EMG has been reported in early stages of PSP patients as well. [ 6 16 18 ]…”