Effects of Tactile Sensitivity on Structural Variability of Digit Forces during Stable Precision Grip
Joint Authors
Source
Issue
Vol. 2016, Issue 2016 (31 Dec. 2016), pp.1-7, 7 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2016-10-25
Country of Publication
Egypt
No. of Pages
7
Main Subjects
Abstract EN
This study investigated the effects of fingertip tactile sensitivity on the structural variability of thumb and index finger forces during stable precision grip.
Thirty right-handed healthy subjects participated in the experiment.
Transient perturbation of tactile afferents was achieved by wrapping up the distal pads of the thumb or index finger with transparent polyethylene films.
The time-dependent structure of each digit force and the variability of interdigit force correlation were examined by detrended fluctuation analysis (DFA) and detrended cross-correlation analysis (DCCA), respectively.
Results showed that the tactile sensitivity affected αDFA of the vertical shear force Fx (F3,239 = 6.814, p<0.001) and αDCCA of Fx (χ2 = 16.440, p<0.001).
No significant difference was observed in αDFA or αDCCA of the normal forces produced by the thumb or index finger.
These results suggested that with blurred tactile sensory inputs the central nervous system might decrease the vertical shear force flexibility and increase the interdigit shear force coupling in order to guarantee a stable grip control of an object against gravity.
This study shed light on the feedback and feed-forward strategies involved in digit force control and the role of SA-II afferent fibers in regulation of vertical shear force variability for precision grip.
American Psychological Association (APA)
Li, Ke& Wei, Na& Yue, Shouwei. 2016. Effects of Tactile Sensitivity on Structural Variability of Digit Forces during Stable Precision Grip. BioMed Research International،Vol. 2016, no. 2016, pp.1-7.
https://search.emarefa.net/detail/BIM-1099029
Modern Language Association (MLA)
Li, Ke…[et al.]. Effects of Tactile Sensitivity on Structural Variability of Digit Forces during Stable Precision Grip. BioMed Research International No. 2016 (2016), pp.1-7.
https://search.emarefa.net/detail/BIM-1099029
American Medical Association (AMA)
Li, Ke& Wei, Na& Yue, Shouwei. Effects of Tactile Sensitivity on Structural Variability of Digit Forces during Stable Precision Grip. BioMed Research International. 2016. Vol. 2016, no. 2016, pp.1-7.
https://search.emarefa.net/detail/BIM-1099029
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1099029