Organization of physiological tremors and coordination solutions to postural pointing on an uneven stance surface

Mei Chun Guo, Jeng-Feng Yang, Chien Ting Huang, Ing-Shiou Hwang

研究成果: Article

4 引文 (Scopus)

摘要

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.

原文English
頁(從 - 到)589-597
頁數9
期刊Journal of Electromyography and Kinesiology
22
發行號4
DOIs
出版狀態Published - 2012 八月 1

指紋

Tremor
Organizations
Upper Extremity
Lower Extremity
Foot
Volunteers
Arm
Joints

All Science Journal Classification (ASJC) codes

  • Neuroscience (miscellaneous)
  • Biophysics
  • Clinical Neurology

引用此文

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