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Autonomic dysfunction in different subtypes of multiple system atrophy.

Claudia Schmidt1, Birgit Herting, Silke Prieur

  • 1Autonomic and neuroendocrinological laboratory, University of Dresden, Germany.

Movement Disorders : Official Journal of the Movement Disorder Society
|July 29, 2008
PubMed
Summary

Multiple system atrophy (MSA) presents in cerebellar (MSA-C) and parkinsonian (MSA-P) forms. While MSA-P patients report more autonomic symptoms, both MSA types show similar autonomic dysfunction patterns.

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Area of Science:

  • Neurology
  • Autonomic Neuroscience

Background:

  • Multiple system atrophy (MSA) is a neurodegenerative disorder with distinct clinical phenotypes: cerebellar (MSA-C) and parkinsonian (MSA-P).
  • The comparative profile and severity of autonomic dysfunction between MSA-C and MSA-P remain incompletely understood.

Purpose of the Study:

  • To investigate and compare the patterns of autonomic dysfunction in patients with MSA-C and MSA-P.
  • To identify potential differences in autonomic symptom presentation and objective test results between the two MSA variants.

Main Methods:

  • A cohort of 12 MSA-C patients and 26 MSA-P patients were assessed.
  • A control group of 27 age- and sex-matched healthy individuals participated.
  • Standardized autonomic function tests and a structured autonomic nervous system anamnesis were employed.

Main Results:

  • MSA-P patients reported significantly more autonomic symptoms than MSA-C patients, particularly affecting vasomotor, secretomotor, and gastrointestinal functions.
  • No significant quantitative or qualitative differences in cardiovascular, sudomotor, pupillary, urogenital, or sleep subsystems were observed between MSA-C and MSA-P.

Conclusions:

  • The study indicates that while MSA-P patients experience a higher burden of certain autonomic symptoms, the overall pattern of autonomic dysfunction shows only minor differences between MSA-C and MSA-P phenotypes.
  • These findings suggest a largely overlapping autonomic involvement across the main clinical variants of MSA.