A measurement of the controllability on pursuit tracking.
- VernacularTitle:各種追従動作からみた肘関節運動の調節能力の測定
- Author:
HIRAKU KITAMOTO
- Publication Type:Journal Article
- Keywords:
Controllability;
Exercise of the elbow joint;
Pursuit movement
- From:Japanese Journal of Physical Fitness and Sports Medicine
1991;40(1):74-82
- CountryJapan
- Language:Japanese
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Abstract:
The purpose of this study was to investigate the controllability of several pursuit movements of the arm muscles. Three subjects in a sitting position were studied for elbow flextion and extension. Three wave forms (sinusoidal, sawtooth and rectangular) on VDT were followed by the subjects, and 5 work loads were given at 0.3 Hz frequency.
The following results were obtained.
1. There was phasic delay in the order: sinusoidal (-10°), sawtooth (-15°), rectangular (-20°) .
2. An overshoot phenomenon was observed for each wave form during the flexion phase at a work load under 10% of the maximum strength. At a work load of over 10% of the maximum strength, an undeshoot phenomenon was observed.
3. With regrd to controllability, the error area increased in the order: sinusoidal (4-7%), sawtooth (6-12%), rectangular (15-25%) .
4. There was a significantly smaller EMG output from antagonists during both the flexion and extension phases at workloads of 4 and 8 kg.
