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Synergistic finger movements in a skilled motor task
1Department of Physiology, University of Minnesota, Minneapolis 55455.
Experimental Brain Research
|January 1, 1992
Summary
Skilled typists often move multiple fingers simultaneously. This study found that while fingers tend to move in unison during typing, they can also move independently when necessary for the task.
Area of Science:
- Neuroscience
- Biomechanics
- Human-Computer Interaction
Background:
- Skilled typists exhibit complex hand and finger movements.
- Simultaneous finger motion is common during key presses.
Purpose of the Study:
- To investigate the degree of similarity in individual finger motion during skilled typing.
- To determine if fingers move in coordination or independently.
Main Methods:
- Subjects typed specially designed word lists.
- Changes in finger length (flexion-extension) and orientation (abduction-adduction) were measured.
- Correlation coefficients assessed the similarity of paired finger motions.
Main Results:
- Finger motions showed significant positive correlation, indicating coordinated movement.
- Adjacent fingers exhibited higher correlation than non-adjacent fingers.
- Correlation decreased when a finger was actively used for key press.
Conclusions:
- Skilled typing involves a general tendency for fingers to move together.
- Fingers can achieve independent motion when a specific task demands it.