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학제간연구 과학기술학 뇌인지과학 기술정책 기타 복합학

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논문 기본 정보

자료유형
학술저널
저자정보
Shin, Narae (Department of Physical Education, Seoul National University) Xu, Dayuan (Department of Physical Education, Seoul National University) Song, Jun Kyung (Department of Physical Education, Seoul National University) Park, Jaebum (Department of Physical Education, Seoul National University)
저널정보
한국운동역학회 한국운동역학회지 한국운동역학회지 제29권 제3호
발행연도
2019.1
수록면
157 - 166 (10page)

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초록· 키워드

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Objective: This study examined the effects of stimulating fingertip temperature on the patterns of force sharing and stability properties during multi-finger force production tasks. Method: 9 adult subjects (male: 3, female: 6, age: $26.11{\pm}4.01yrs$, height: $169.22{\pm}5.97cm$, weight: $61.44{\pm}11.27kg$) participated in this study. The experiment consisted of three blocks: 1) maximal voluntary contraction (MVC) task, 2) single-finger ramp task to quantify enslaving (i.e., unintended force production by non-task fingers), and 3) 12 trials of multi-finger steady-state force production task at 20% MVC. There were three temperature conditions including body-temperature (i.e., control condition), $40^{\circ}C$, and $43^{\circ}C$, and the stimulation was given to the index finger only for all experimental conditions. Results: There were no significant differences in the MVC forces, enslaving, and the accuracy of performance during the steady-state task between the conditions. However, the share of stimulated index finger force increased with the index fingertip temperature, while the share of middle finger force decreased. Also, the coefficient of variation of both index and middle finger forces over repetitive trials increased with the index fingertip temperature. Under the framework of the uncontrolled manifold (UCM) hypothesis used to quantify indices of multi-finger synergies (i.e., stability property) stabilizing total force during the steady-state task, the two variance components within the UCM analysis increased together with the fingertip temperature, while no changes in the synergy indices between the conditions. Conclusion: The current results showed that fingertip temperature stimulation only to index finger does not affect to muscle force production capability of multi-finger, independence of individual fingers, and force production accuracy by the involvement of all four fingers. The effect of fingertip temperature on the sharing pattern and force variation may be due to diffuse reflex effects of the induced afferent activity on alpha-motoneuronal pools. However, the unchanged stability properties may be the reflection of the active error compensation strategies by non-stimulated finger actions.
#Temperature #Cutaneous stimulus #Maximal voluntary contraction #Enslaving #Stability #Error compensation strategy #Synergy

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참고문헌 (28)

참고문헌 신청
Arpinar-Avsar, P. / 2013 / Effects of muscle vibration on multi-finger interaction and coordination / Experimental Brain Research 229(1):103~111 google schola Augurelle, A. S. / 2003 / Importance of cutaneous feedback in maintaining a secure grip during manipulation of hand-held objects / Journal of Neurophysiology 89(2):665~671 google schola Blouin, J. S. / 2003 / Postural stability is altered by the stimulation of pain but not warm receptors in humans / BMC Musculoskeletal Disorders 4(1):23 google schola Cole, J. D. / 1992 / The perceptions of force and of movement in a man without large myelinated sensory afferents below the neck / The Journal of Physiology 449(1):503~515 google schola Côté, J. N. / 2008 / Effects of fatigue on intermuscular coordination during repetitive hammering / Motor Control 12(2):79~92 google schola

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