著者

Jun Yabuki Kazuto Yamaguchi Takashi Ito Kazunori Akizuki Yukari Ohashi

出版者

The Society of Physical Therapy Science

雑誌

Journal of Physical Therapy Science (ISSN:09155287)

巻号頁・発行日

vol.32, no.10, pp.691-697, 2020 (Released:2020-10-03)

参考文献数

30

被引用文献数

1

---

[Purpose] Improvement in the smoothness of movement is a motor learning outcome. This study sought to clarify the relationship between motor skills and smoothness of movement in motor learning. [Participants and Methods] We subjected 12 healthy adults to a task in which they had to learn the sensation of a load while standing up and sitting down. We attached triaxial accelerometers to the seventh cervical spine and the third lumbar spinous process of the participants prior to measurement. We took the measurements over two successive days and used absolute error and variable error as indicators of motor learning outcomes. In addition, we used entropy, calculated from the results of the power spectrum analysis of acceleration changes, as an indicator of the smoothness of the movement. [Results] In the test sessions, absolute and variable errors showed a significant reduction. Entropy also showed a similarly significant decrease, although the change in errors and entropy showed different transitions. [Conclusion] Qualitative indicators of motor learning captured an aspect of motor learning that one cannot capture by quantitative indicators. In the future, qualitative indicators will be necessary to judge the outcomes of motor learning.

著者

Tatsuya Kaneno Muku Ito Naoto Kiguchi Akihiro Sato Kazunori Akizuki Jun Yabuki Yuki Echizenya Satoshi Shibata

出版者

Japanese Association of Occupational Therapists

雑誌

Asian Journal of Occupational Therapy (ISSN:13473476)

巻号頁・発行日

vol.15, no.1, pp.69-75, 2019 (Released:2019-09-28)

参考文献数

31

被引用文献数

2

---

Purpose: This study aimed to compare adjustability of grasping force (AGF) between people belonging to young and elderly age-groups. Methods: Twenty young people and 20 elderly people, with no previous pathology involving the hands and fingers, were included in the study, and an AGF assessment was performed for all the subjects using an iWakka. Subjects adjusted the grasping force according to the target value displayed on the monitor by opening or closing the iWakka. Results: The assessment of AGF was performed separately from that of the gripping force, and the latter was found to be comparable between the two groups. The mean AGF was found to be 8.9 ± 4.0 g and 7.6 ± 2.8 g for the dominant and the non-dominant hand, respectively, in the elderly group, as compared to the mean AGF for the dominant and the non-dominant hand of 4.4 ± 1.2 g and 4.4 ± 0.6 g, respectively estimated in the young age-group. A t-test conducted after controlling the disparate factors (sex, handedness, gripping force) between the subjects of the two groups, showed that there was a significant difference in AGF between the young and the elderly groups for both the dominant (p = 0.03) and the non-dominant hand (p = 0.02), indicating that the AGF of the elderly people was significantly lower than that of the young study-subjects.Conclusions: Our findings suggest that AGF decreases with aging and that it is necessary to assess AGF separately from the gripping force, to make a precise comparison.