Abstract：
:Postural sway during upright stance was analyzed in 12 patients with phobic postural vertigo (PPV) and in 12 age-matched healthy volunteers. Recordings were made under different conditions (with the eyes open or closed): when standing on a foam rubber pad with the head upright, turned 30 degrees to the right or left, or during 1 Hz horizontal head oscillations. Sway analysis included calculation of sway path, of root mean square values of sway and of the power spectrum of sway in fore/aft and lateral directions. There was a significant increase in sway activity in the 3.53-8 Hz frequency band in patients with PPV. This did not impair objective postural stability. Increase in higher frequency sway activity may simply reflect a change in postural strategy rather than a sensorimotor dysfunction. The patients' conscious control of stance may augment co-activation of anti-gravity muscles, a strategy applied by normal subjects when performing demanding balancing tasks.
journal_name
Neurosci Lettjournal_title
Neuroscience lettersauthors
Krafczyk S,Schlamp V,Dieterich M,Haberhauer P,Brandt Tdoi
10.1016/s0304-3940(98)00917-3keywords:
subject
Has Abstractpub_date
1999-01-15 00:00:00pages
149-52issue
3eissn
0304-3940issn
1872-7972pii
S0304394098009173journal_volume
259pub_type
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