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Decreased postural adaptation in patients with phobic postural vertigo-An effect of an "anxious" control of posture?

Tjernström, Fredrik LU ; Fransson, Per-Anders LU ; Holmberg, Johan LU ; Karlberg, Mikael LU and Magnusson, Måns LU (2009) In Neuroscience Letters 454(3). p.198-202
Abstract
Postural adaptability and responses elicited by vibratory stimulation to the calf muscles recorded on a force platform with eyes open or closed were analyzed in 39 patients suffering from Postural Phobic Vertigo (PPV) (17 men and 22 women, mean age 49 years) and 24 healthy subjects (14 men, 10 women, mean age 38 years). The vibration induced increased body sway in both groups, but the adaptation pattern differed significantly. With eyes open the PPV patients decreased their induced body sway over time (-32%, p < 0.01), which the controls did not. With eyes closed the PPV patients reduced their induced body sway over time to a much lesser extent than the controls (PPV: -28%, p < 0.05, controls: -57%, p < 0.001). These new findings... (More)
Postural adaptability and responses elicited by vibratory stimulation to the calf muscles recorded on a force platform with eyes open or closed were analyzed in 39 patients suffering from Postural Phobic Vertigo (PPV) (17 men and 22 women, mean age 49 years) and 24 healthy subjects (14 men, 10 women, mean age 38 years). The vibration induced increased body sway in both groups, but the adaptation pattern differed significantly. With eyes open the PPV patients decreased their induced body sway over time (-32%, p < 0.01), which the controls did not. With eyes closed the PPV patients reduced their induced body sway over time to a much lesser extent than the controls (PPV: -28%, p < 0.05, controls: -57%, p < 0.001). These new findings show that PPV patients adapt to proprioceptive perturbation to a lesser extent than normal subjects and that PPV patients do not use visual information as efficiently to modulate postural control. The results support the hypothesis that a cognitive set of posture, an "anxious control", may underlie the symptoms of PPV, i.e. an increased readiness to react to any perturbation or deviation. (C) 2009 Elsevier Ireland Ltd. All rights reserved. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Adaptation, Phobic postural vertigo, Posture, Non-organic dizziness
in
Neuroscience Letters
volume
454
issue
3
pages
198 - 202
publisher
Elsevier
external identifiers
  • wos:000265275500006
  • pmid:19429083
  • scopus:63249120286
ISSN
0304-3940
DOI
10.1016/j.neulet.2009.03.020
language
English
LU publication?
yes
id
db97c71f-2a79-489a-b490-389ad3ac2295 (old id 1400195)
alternative location
http://www.ncbi.nlm.nih.gov/pubmed/19429083?dopt=Abstract
date added to LUP
2009-06-15 14:58:32
date last changed
2017-01-01 04:35:28
@article{db97c71f-2a79-489a-b490-389ad3ac2295,
  abstract     = {Postural adaptability and responses elicited by vibratory stimulation to the calf muscles recorded on a force platform with eyes open or closed were analyzed in 39 patients suffering from Postural Phobic Vertigo (PPV) (17 men and 22 women, mean age 49 years) and 24 healthy subjects (14 men, 10 women, mean age 38 years). The vibration induced increased body sway in both groups, but the adaptation pattern differed significantly. With eyes open the PPV patients decreased their induced body sway over time (-32%, p &lt; 0.01), which the controls did not. With eyes closed the PPV patients reduced their induced body sway over time to a much lesser extent than the controls (PPV: -28%, p &lt; 0.05, controls: -57%, p &lt; 0.001). These new findings show that PPV patients adapt to proprioceptive perturbation to a lesser extent than normal subjects and that PPV patients do not use visual information as efficiently to modulate postural control. The results support the hypothesis that a cognitive set of posture, an "anxious control", may underlie the symptoms of PPV, i.e. an increased readiness to react to any perturbation or deviation. (C) 2009 Elsevier Ireland Ltd. All rights reserved.},
  author       = {Tjernström, Fredrik and Fransson, Per-Anders and Holmberg, Johan and Karlberg, Mikael and Magnusson, Måns},
  issn         = {0304-3940},
  keyword      = {Adaptation,Phobic postural vertigo,Posture,Non-organic dizziness},
  language     = {eng},
  number       = {3},
  pages        = {198--202},
  publisher    = {Elsevier},
  series       = {Neuroscience Letters},
  title        = {Decreased postural adaptation in patients with phobic postural vertigo-An effect of an "anxious" control of posture?},
  url          = {http://dx.doi.org/10.1016/j.neulet.2009.03.020},
  volume       = {454},
  year         = {2009},
}