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Postural reaction during maximum grasping maneuvers using a hand dynamometer in healthy subjects
Tadayuki Kato1, Kei Miyamoto, Katsuji Shimizu
1Department of Physical Therapy and Rehabilitation, Gifu University Hospital, Gifu, Japan.
Gait & Posture
|September 1, 2004
Summary
This study quantitatively evaluated body sway during maximum hand grasping. The body's center of gravity shifted towards the grasping side, with trunk rotation and neck flexion observed.
Area of Science:
- Biomechanics
- Human Movement Analysis
- Clinical Assessment
Background:
- Spontaneous body sway is a key indicator of postural control.
- Maximum grasping maneuvers are relevant in clinical settings for assessing strength and stability.
Purpose of the Study:
- To quantitatively evaluate spontaneous body sway during maximum grasping.
- To analyze whole-body postural reactions during a maximal hand dynamometer grip.
Main Methods:
- Utilized a three-dimensional motion analysis system (VICON) and force plates.
- Recruited 26 right-handed healthy male volunteers.
- Measured postural reactions during maximum grasping maneuvers.
Main Results:
- The body's center of gravity shifted significantly towards the side of the grasp.
- Voluntary trunk rotation was observed during grasping.
- Neck flexion was noted during grasping on both sides.
Conclusions:
- Maximum grasping elicits measurable body sway and postural adjustments.
- These findings provide quantitative data on the biomechanics of grasping.
- Understanding these reactions can inform clinical assessments of balance and strength.