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Postural stability differentiates "lower body" from idiopathic parkinsonism
C Trenkwalder1, W Paulus, S Krafczyk
1Department of Neurology, Ludwig-Maximilians-University of Munich, Germany.
Acta Neurologica Scandinavica
|June 1, 1995
Summary
Lower body Parkinsonism (LBP) patients exhibit greater postural instability than Parkinson's disease (PD) patients, particularly under challenging sensory conditions. Posturography aids in differentiating these conditions, crucial for gait disorder diagnosis.
Area of Science:
- Neurology
- Movement Disorders
- Biomedical Engineering
Background:
- Lower body Parkinsonism (LBP) is a Parkinson syndrome variant characterized by lower extremity akinesia, poor L-DOPA response, frequent falls, and impaired balance.
- Distinguishing LBP from advanced Parkinson's disease (PD) is clinically important for appropriate management.
Purpose of the Study:
- To compare postural control deficits in LBP patients versus advanced PD patients using static and dynamic posturography.
- To evaluate the utility of posturography in the differential diagnosis of Parkinson syndromes presenting with gait disturbances.
Main Methods:
- Evaluated 11 LBP patients (6 with white matter lesions on MRI) and 10 advanced PD patients using static (force platform) and dynamic (Equitest) posturography.
- Compared patient performance to 30 age-matched healthy controls across various sensory conditions.
Main Results:
- LBP patients showed significantly worse balance than PD patients on foam surfaces (eyes open and closed) and during dynamic testing (eyes closed, sway-referenced support).
- PD patients' balance deteriorated only under the 'eyes closed on foam' condition.
- Dynamic posturography effectively differentiated LBP from PD patients.
Conclusions:
- Postural adjustments are more severely impaired in LBP patients compared to PD patients.
- Posturography serves as a valuable tool for the differential diagnosis of Parkinson syndromes with gait disorders.