Details
| Original language | English |
|---|---|
| Pages (from-to) | 759-766 |
| Number of pages | 8 |
| Journal | Clinical neurophysiology |
| Volume | 122 |
| Issue number | 4 |
| Publication status | Published - Apr 2011 |
Abstract
Objective: Investigating motor control processes is of primary interest in a number of scientific and practical fields. Movement variability is of increasing interest in this context. However, until now little has been known about the time course of variability during movement execution. The objective of this study was to investigate the influence of visual information and task specification on the variability of joint angle motion in reaching movements. Methods: Subjects repetitively reached for a handle. Movement variability was quantified by the within-subjects standard deviation of mean joint angle. The analysis focused on the time course of variability during movement execution. Results: The availability of visual information did not influence the time course of joint angle variability whereas task specification on reaching accuracy did. Under high accuracy demand variability was reduced more strongly after reaching its maximum. Conclusions: Results suggest that the availability of visual information plays a minor role in the control of well-trained reaching movements. This suggests that proprioceptive information is the main feedback source to control these movements. Significance: The analysis of the time course of movement variability might be a valuable method to investigate the central or peripheral causes of movement disorders for diagnostic and rehabilitation purposes.
Keywords
- Accuracy, Assessment, Grasping, Motor control, Variance, Visual feedback
ASJC Scopus subject areas
- Neuroscience(all)
- Sensory Systems
- Neuroscience(all)
- Neurology
- Medicine(all)
- Clinical Neurology
- Medicine(all)
- Physiology (medical)
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In: Clinical neurophysiology, Vol. 122, No. 4, 04.2011, p. 759-766.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Joint angle variability in the time course of reaching movements
AU - Krüger, Melanie
AU - Eggert, T.
AU - Straube, A.
N1 - Funding information: This work was supported by the Research Training Group 1091 “Orientation and Motion in Space” of the German Research Foundation (DFG).
PY - 2011/4
Y1 - 2011/4
N2 - Objective: Investigating motor control processes is of primary interest in a number of scientific and practical fields. Movement variability is of increasing interest in this context. However, until now little has been known about the time course of variability during movement execution. The objective of this study was to investigate the influence of visual information and task specification on the variability of joint angle motion in reaching movements. Methods: Subjects repetitively reached for a handle. Movement variability was quantified by the within-subjects standard deviation of mean joint angle. The analysis focused on the time course of variability during movement execution. Results: The availability of visual information did not influence the time course of joint angle variability whereas task specification on reaching accuracy did. Under high accuracy demand variability was reduced more strongly after reaching its maximum. Conclusions: Results suggest that the availability of visual information plays a minor role in the control of well-trained reaching movements. This suggests that proprioceptive information is the main feedback source to control these movements. Significance: The analysis of the time course of movement variability might be a valuable method to investigate the central or peripheral causes of movement disorders for diagnostic and rehabilitation purposes.
AB - Objective: Investigating motor control processes is of primary interest in a number of scientific and practical fields. Movement variability is of increasing interest in this context. However, until now little has been known about the time course of variability during movement execution. The objective of this study was to investigate the influence of visual information and task specification on the variability of joint angle motion in reaching movements. Methods: Subjects repetitively reached for a handle. Movement variability was quantified by the within-subjects standard deviation of mean joint angle. The analysis focused on the time course of variability during movement execution. Results: The availability of visual information did not influence the time course of joint angle variability whereas task specification on reaching accuracy did. Under high accuracy demand variability was reduced more strongly after reaching its maximum. Conclusions: Results suggest that the availability of visual information plays a minor role in the control of well-trained reaching movements. This suggests that proprioceptive information is the main feedback source to control these movements. Significance: The analysis of the time course of movement variability might be a valuable method to investigate the central or peripheral causes of movement disorders for diagnostic and rehabilitation purposes.
KW - Accuracy
KW - Assessment
KW - Grasping
KW - Motor control
KW - Variance
KW - Visual feedback
UR - http://www.scopus.com/inward/record.url?scp=79952316131&partnerID=8YFLogxK
U2 - 10.1016/j.clinph.2010.10.003
DO - 10.1016/j.clinph.2010.10.003
M3 - Article
C2 - 21030301
AN - SCOPUS:79952316131
VL - 122
SP - 759
EP - 766
JO - Clinical neurophysiology
JF - Clinical neurophysiology
SN - 1388-2457
IS - 4
ER -