University of Twente Student Theses
The influence of the velocity of support surface rotations on sensory reweighting during standing balance.
Zoetbrood, E.J.C. (2020) The influence of the velocity of support surface rotations on sensory reweighting during standing balance.
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| Abstract: | Multiple sensory organs contribute to the control of balance. The signals from these sensors are combined in the brain, where reliable information is favoured over unreliable information: a process called sensory reweighting. Support surface rotations can be used to investigate sensory reweighting during balance. Typically, a pseudorandom ternary stimulus (PRTS) is applied. With the increase of the amplitude of the PRTS, proprioceptive sensory information is downweighted. However, by increasing amplitude, the velocity is indirectly increased. The aim of this study is to investigate the influence of the velocity of support surface rotations on sensory reweighting during standing balance. Four healthy subjects stood on a rotating support surface, following a PRTS signal, for nine trials. A base trial, four trials with an increasing amplitude but the same duration as the base trial and four trials with an increasing amplitude but the same velocity as the base trial. For every trial, body sway and ankle torque were measured. The RMS, sensitivity functions and coherence of the ankle torque and body sway were obtained. With an increase of amplitude and the same duration, the RMS increased, and the sensitivity functions mostly decreased. With an increase of amplitude and the same velocity, the RMS mostly increased, and the sensitivity functions fluctuated. In conclusion, both PRTS amplitude and PRTS velocity have an influence on sensory reweighting and should be considered. |
| Item Type: | Essay (Master) |
| Faculty: | ET: Engineering Technology |
| Programme: | Biomedical Engineering MSc (66226) |
| Link to this item: | https://purl.utwente.nl/essays/85809 |
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