Controlled Exertion of Force by Developmentally Delayed Young Men and Women

Nagasawa, Yoshinori; Demura, Shinichi

doi:10.2466/pms.101.2.487-497

Cited by 2 publications

(3 citation statements)

References 27 publications

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“…The controlled force-exertion test (Nagasawa & Demura, 2002;Nagasawa, Demura, & Nakada, 2003;Nagasawa, Demura, & Kitabayashi, 2004;Nagasawa & Demura, 2005;Nagasawa & Demura, 2008) uses submaximal grip strength. In the test, the subjects match their submaximal grip strength to changing demand values displayed in a waveform on the display of a personal computer.…”

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“…is used as the evaluation parameter for the test. Nagasawa, et al (2003Nagasawa, et al ( , 2005 compared controlled force-exertion test scores of young and elderly, and disabled and healthy participants. They found that the total sum of the difference between grip strength and demand value of older and disabled people was significantly larger than for the respective comparison groups.…”

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Superiority of the Dominant and Nondominant Hands in Static Strength and Controlled Force Exertion

2009

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The dominant hand can be defined in such a way that Oldfield's Handedness Inventory may not identify the superior hand, i.e., the hand with more strength and/or more force control. The dominant and nondominant hands were compared for two different grip force-exertion tests. 50 healthy young men (M age = 21.1 yr.) performed two tests with each hand: a maximal grip strength test and a controlled force-exertion test with dynamic demand. In the latter test, the participants matched their submaximal grip force to the changing demand values with real-time feedback. The total sum of the differences between the demand value and grip force value for 25 sec. was used as an evaluation parameter for the test (unit: %). Mean maximal grip force values in the right and left hands were 439.9 N (SD = 59.1) and 405.6 N (SD = 59.3), respectively. Mean controlled force-exertion test values in the right and left hands were 610.3% (SD = 150.2) and 722.6% (SD = 147.8), respectively. In both tests, the dominant hand was significantly stronger and controlled dynamic force better. The relationship between the two hands was very high. Based on this study's criteria, the dominant hand was stronger in 34% (n = 17) of participants during the maximal grip strength test and more controlled in 54% (n = 27) of participants during the controlled force-exertion test. Thus, the dynamic force control test showed that for significantly more people the dominant hand is stronger and controls force better. Controlled force exertion may be a better test for identifying the superior hand.

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Superiority of the Dominant and Nondominant Hands in Static Strength and Controlled Force Exertion

2009

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“…The results showed more tracking errors from neuromuscular patients, and some of these patients showed more than two times higher errors. Nagasawa and Demura (2005) carried out a controlled force exertion test for grip force control that targeted patients with encephalomeningitis, schistorrachis and cerebral palsy, and healthy people. According to the results of the research, the performance (sum of target values and exerted value) of the patients with encephalomeningitis and schistorrachis was significantly higher than that of the healthy people.…”

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The Effects of Age, Gender, and Target Force Level on Controlled Force Exertion Tasks

Kong¹,

Lee²,

Kim³

et al. 2017

Journal of the Ergonomics Society of Korea

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Objective: The purpose of this study is to build basic data to systematically develop a hand function evaluation tool by determining the effects of age, gender and target force level on the difference in hand function according to the target force level.Background: Precise and objective evaluation of hand functionality is a very important factor in quantifying treatment progress in patients or elderly people, and in verifying treatment effects. However, most hand function evaluations lack objectivity and accuracy, and therefore it is difficult to properly treat patients according to the given situation.Method: Sixteen healthy subjects (eight elderly and eight young people) participated in this study to evaluate the effects of age, gender, and target force level on tracking performance through rRMSE in terms of the tracking force and actual exerted force, by carrying out a task of maintaining six different target force levels for 20 seconds.Results: The result of this experiment indicated that elderly people and women had a lower ability to maintain a certain level of force than young people and men by 16% and 10%, respectively. The target force level results showed that the tracking error of the lowest force level (5% MVC) was significantly higher than that of 15% MVC, which in turn showed a higher tracking error than that of the higher target force levels. Conclusion:The results of this study can thus be utilized to develop a rehabilitation program for elderly people or other patients.Application: The authors expect that the results of the present study will be valuable to develop a rehabilitation program and hand function evaluation tool.

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Controlled Exertion of Force by Developmentally Delayed Young Men and Women

Cited by 2 publications

References 27 publications

Superiority of the Dominant and Nondominant Hands in Static Strength and Controlled Force Exertion

Superiority of the Dominant and Nondominant Hands in Static Strength and Controlled Force Exertion

The Effects of Age, Gender, and Target Force Level on Controlled Force Exertion Tasks

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