Abstract
The study investigated the destabilization effect on multi-segment physiological tremors and coordinative control for a postural-suprapostural task under different stance conditions. Twenty volunteers executed postural pointing from a level surface and a seesaw balance board; meanwhile, physiological tremors of the whole postural system and fluctuation movements of fingertip/stance surface were recorded. In reference to level stance, seesaw stance led to much fewer tremor increments of the upper limb and less fluctuation movement of the fingertip than tremor increment of the lower limb and rolling movement of the stance surface. Tremor coupling between the adjacent segments organized differentially with stance surface. In reference to level stance, seesaw stance reinforced tremor coupling of the upper limb but enfeebled the coupling in the arm-lumbar and calf-foot complexes. Stance-related differences in physiological tremors could be explained by characteristic changes in the primary and secondary principal components (PC1 and PC2), with relatively high communality with segment tremors of the lower and upper limbs, respectively. Seesaw stance introduced a prominent 4-8. Hz spectral peak in PC1 and potentiated 1-4. Hz and 8-12. Hz spectral peaks of PC2. Structural reorganization of physiological tremors with stance configuration suggests that seesaw stance involves distinct suprapostural and postural synergies for regulating degree of freedom in joint space.
| Original language | English |
|---|---|
| Pages (from-to) | 589-597 |
| Number of pages | 9 |
| Journal | Journal of Electromyography and Kinesiology |
| Volume | 22 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - 2012 Aug 1 |
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All Science Journal Classification (ASJC) codes
- Neuroscience (miscellaneous)
- Biophysics
- Clinical Neurology
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Organization of physiological tremors and coordination solutions to postural pointing on an uneven stance surface. / Guo, Mei Chun; Yang, Jeng-Feng; Huang, Chien Ting; Hwang, Ing-Shiou.
In: Journal of Electromyography and Kinesiology, Vol. 22, No. 4, 01.08.2012, p. 589-597.Research output: Contribution to journal › Article
TY - JOUR
T1 - Organization of physiological tremors and coordination solutions to postural pointing on an uneven stance surface
AU - Guo, Mei Chun
AU - Yang, Jeng-Feng
AU - Huang, Chien Ting
AU - Hwang, Ing-Shiou
PY - 2012/8/1
Y1 - 2012/8/1
N2 - The study investigated the destabilization effect on multi-segment physiological tremors and coordinative control for a postural-suprapostural task under different stance conditions. Twenty volunteers executed postural pointing from a level surface and a seesaw balance board; meanwhile, physiological tremors of the whole postural system and fluctuation movements of fingertip/stance surface were recorded. In reference to level stance, seesaw stance led to much fewer tremor increments of the upper limb and less fluctuation movement of the fingertip than tremor increment of the lower limb and rolling movement of the stance surface. Tremor coupling between the adjacent segments organized differentially with stance surface. In reference to level stance, seesaw stance reinforced tremor coupling of the upper limb but enfeebled the coupling in the arm-lumbar and calf-foot complexes. Stance-related differences in physiological tremors could be explained by characteristic changes in the primary and secondary principal components (PC1 and PC2), with relatively high communality with segment tremors of the lower and upper limbs, respectively. Seesaw stance introduced a prominent 4-8. Hz spectral peak in PC1 and potentiated 1-4. Hz and 8-12. Hz spectral peaks of PC2. Structural reorganization of physiological tremors with stance configuration suggests that seesaw stance involves distinct suprapostural and postural synergies for regulating degree of freedom in joint space.
AB - The study investigated the destabilization effect on multi-segment physiological tremors and coordinative control for a postural-suprapostural task under different stance conditions. Twenty volunteers executed postural pointing from a level surface and a seesaw balance board; meanwhile, physiological tremors of the whole postural system and fluctuation movements of fingertip/stance surface were recorded. In reference to level stance, seesaw stance led to much fewer tremor increments of the upper limb and less fluctuation movement of the fingertip than tremor increment of the lower limb and rolling movement of the stance surface. Tremor coupling between the adjacent segments organized differentially with stance surface. In reference to level stance, seesaw stance reinforced tremor coupling of the upper limb but enfeebled the coupling in the arm-lumbar and calf-foot complexes. Stance-related differences in physiological tremors could be explained by characteristic changes in the primary and secondary principal components (PC1 and PC2), with relatively high communality with segment tremors of the lower and upper limbs, respectively. Seesaw stance introduced a prominent 4-8. Hz spectral peak in PC1 and potentiated 1-4. Hz and 8-12. Hz spectral peaks of PC2. Structural reorganization of physiological tremors with stance configuration suggests that seesaw stance involves distinct suprapostural and postural synergies for regulating degree of freedom in joint space.
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U2 - 10.1016/j.jelekin.2012.03.002
DO - 10.1016/j.jelekin.2012.03.002
M3 - Article
VL - 22
SP - 589
EP - 597
JO - Journal of Electromyography and Kinesiology
JF - Journal of Electromyography and Kinesiology
SN - 1050-6411
IS - 4
ER -