Light touch for balance: influence of a time-varying external driving signal
Identifieur interne : 001515 ( Pmc/Corpus ); précédent : 001514; suivant : 001516Light touch for balance: influence of a time-varying external driving signal
Auteurs : Alan M. Wing ; Leif Johannsen ; Satoshi EndoSource :
- Philosophical Transactions of the Royal Society B: Biological Sciences [ 0962-8436 ] ; 2011.
Abstract
Sensory information about body sway is used to drive corrective muscle action to keep the body's centre of mass located over the base of support provided by the feet. Loss of vision, by closing the eyes, usually results in increased sway as indexed by fluctuations (i.e. standard deviation, s.d.) in the velocity of a marker at C7 on the neck, s.d. dC7. Variability in the rate of change of centre of pressure (s.d. dCoP), which indexes corrective muscle action, also increases during upright standing with eyes closed. Light touch contact by the tip of one finger with an environmental surface can reduce s.d. dC7 and s.d. dCoP as effectively as opening the eyes. We review studies of light touch and balance and then describe a novel paradigm for studying the nature of somatosensory information contributing to effects of light touch balance. We show that ‘light
Url:
DOI: 10.1098/rstb.2011.0169
PubMed: 21969695
PubMed Central: 3172607
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