Inadequate interaction between open- and closed-loop postural control in phobic postural vertigo

Phobic postural vertigo (PPV) is characterized by a subjective dizziness and postural imbalance. Changes in postural control strategy may cause the disturbed postural performance in PPV. A better understanding of the mechanisms behind this change in strategy is required to improve the diagnostic too...

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Bibliographic Details
Published in:Journal of neurology 2013-05, Vol.260 (5), p.1314-1323
Main Authors: Wuehr, M., Pradhan, C., Novozhilov, S., Krafczyk, S., Brandt, T., Jahn, K., Schniepp, R.
Format: Article
Language:English
Subjects:
Adult
Analysis of Variance
Case-Control Studies
Energy consumption
Female
Humans
Male
Medicine
Medicine & Public Health
Middle Aged
Muscle function
Neurology
Neuroradiology
Neurosciences
Original Communication
Phobic Disorders - complications
Postural Balance - physiology
Posture
Range of Motion, Articular - physiology
Sensation Disorders - etiology
Vertigo
Vertigo - complications
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Summary:Phobic postural vertigo (PPV) is characterized by a subjective dizziness and postural imbalance. Changes in postural control strategy may cause the disturbed postural performance in PPV. A better understanding of the mechanisms behind this change in strategy is required to improve the diagnostic tools and therapeutic options for this prevalent disorder. Here we apply stabilogram diffusion analysis (SDA) to examine the characteristics and modes of interaction of open- and closed-loop processes that make up the postural control scheme in PPV. Twenty patients with PPV and 20 age-matched healthy controls were recorded on a stabilometer platform with eyes open and with eyes closed. Spatio-temporal changes of the center of pressure (CoP) displacement were analyzed by means of SDA and complementary CoP amplitude measures. (1) Open-loop control mechanisms in PPV were disturbed because of a higher diffusion activity ( p  
ISSN:0340-5354
1432-1459
DOI:10.1007/s00415-012-6797-7