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Foam posturography: standing on foam is not equivalent to standing with decreased rapidly adapting mechanoreceptive sensation.

Patel, Mitesh LU ; Fransson, Per-Anders LU ; Johansson, R and Magnusson, Måns LU (2011) In Experimental Brain Research 208. p.519-527
Abstract
Standing on a foam surface is believed to exaggerate balance deficits by decreasing the reliability of somatosensory information from cutaneous mechanoreceptors on the plantar soles (i.e. base of feet) and by altering the effectiveness of ankle torque. The aim was to further document the nature of foam posturography testing by comparing between standing on foam and standing with decreased Rapidly Adapting Mechanoreceptive Sensation (RAMS). Sixteen healthy adults (mean age 20.8 years) were tested with posturography, standing with eyes open and closed on a solid surface and on foam, with and without decreased plantar RAMS. Standing balance was measured as torque variance and further analyzed by being divided into three spectral categories.... (More)
Standing on a foam surface is believed to exaggerate balance deficits by decreasing the reliability of somatosensory information from cutaneous mechanoreceptors on the plantar soles (i.e. base of feet) and by altering the effectiveness of ankle torque. The aim was to further document the nature of foam posturography testing by comparing between standing on foam and standing with decreased Rapidly Adapting Mechanoreceptive Sensation (RAMS). Sixteen healthy adults (mean age 20.8 years) were tested with posturography, standing with eyes open and closed on a solid surface and on foam, with and without decreased plantar RAMS. Standing balance was measured as torque variance and further analyzed by being divided into three spectral categories. Plantar cutaneous hypothermic anesthesia by ice-cooling was used to decrease RAMS. Plantar mechanoreceptive sensation was precisely determined with tactile sensitivity and vibration perception tests. Vibration perception was significantly decreased by hypothermic anesthesia, but tactile sensitivity was not. The anterior-posterior torque variance was significantly larger for frequencies less than 0.1 Hz under eyes closed conditions when standing on a solid surface with decreased RAMS compared to normal sensation. No effect of decreased RAMS was seen with eyes open on a solid surface, nor on foam with eyes open or closed. Decreased RAMS produced body sway responses on a solid surface that were different in spectral composition, amplitude, direction and that responded differently to vision compared with standing on foam. Hence, this study showed that RAMS contributes to postural control but reduction in RAMS does not produce a similar challenge as standing on foam. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Experimental Brain Research
volume
208
pages
519 - 527
publisher
Springer
external identifiers
  • wos:000286607400004
  • pmid:21120458
  • scopus:79952535560
ISSN
0014-4819
DOI
10.1007/s00221-010-2498-6
language
English
LU publication?
yes
id
f6c6fffa-35a0-45e5-ac19-c45f7419b532 (old id 1756887)
alternative location
http://www.ncbi.nlm.nih.gov/pubmed/21120458?dopt=Abstract
date added to LUP
2011-01-03 11:51:57
date last changed
2017-11-12 04:06:23
@article{f6c6fffa-35a0-45e5-ac19-c45f7419b532,
  abstract     = {Standing on a foam surface is believed to exaggerate balance deficits by decreasing the reliability of somatosensory information from cutaneous mechanoreceptors on the plantar soles (i.e. base of feet) and by altering the effectiveness of ankle torque. The aim was to further document the nature of foam posturography testing by comparing between standing on foam and standing with decreased Rapidly Adapting Mechanoreceptive Sensation (RAMS). Sixteen healthy adults (mean age 20.8 years) were tested with posturography, standing with eyes open and closed on a solid surface and on foam, with and without decreased plantar RAMS. Standing balance was measured as torque variance and further analyzed by being divided into three spectral categories. Plantar cutaneous hypothermic anesthesia by ice-cooling was used to decrease RAMS. Plantar mechanoreceptive sensation was precisely determined with tactile sensitivity and vibration perception tests. Vibration perception was significantly decreased by hypothermic anesthesia, but tactile sensitivity was not. The anterior-posterior torque variance was significantly larger for frequencies less than 0.1 Hz under eyes closed conditions when standing on a solid surface with decreased RAMS compared to normal sensation. No effect of decreased RAMS was seen with eyes open on a solid surface, nor on foam with eyes open or closed. Decreased RAMS produced body sway responses on a solid surface that were different in spectral composition, amplitude, direction and that responded differently to vision compared with standing on foam. Hence, this study showed that RAMS contributes to postural control but reduction in RAMS does not produce a similar challenge as standing on foam.},
  author       = {Patel, Mitesh and Fransson, Per-Anders and Johansson, R and Magnusson, Måns},
  issn         = {0014-4819},
  language     = {eng},
  pages        = {519--527},
  publisher    = {Springer},
  series       = {Experimental Brain Research},
  title        = {Foam posturography: standing on foam is not equivalent to standing with decreased rapidly adapting mechanoreceptive sensation.},
  url          = {http://dx.doi.org/10.1007/s00221-010-2498-6},
  volume       = {208},
  year         = {2011},
}