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Arm path fragmentation and spatiotemporal features of hand reaching in healthy subjects and stroke patients
Liebermann
D
G
author
Levin
M
F
author
McIntyre
J
author
Weiss
P
L
author
Berman
S
author
2010
English
Arm motion in healthy humans is characterized by smooth and relatively short paths. The current study focused on 3D reaching in stroke patients. Sixteen right-hemiparetic stroke patients and 8 healthy adults performed 42 reaching movements towards 3 visual targets located at an extended arm distance. Performance was assessed in terms of spatial and temporal features of the movement; i.e., hand path, arm posture and smoothness. Differences between groups and within subjects were hypothesized for spatial and temporal aspects of reaching under the assumption that both are independent. As expected, upper limb motion of patients was characterized by longer and jerkier hand paths and slower speeds. Assessment of the number of sub-movements within each movement did not clearly discriminate between groups. Principal component analyses revealed specific clusters of either spatial or temporal measures, which accounted for a large proportion of the variance in patients but not in healthy controls. These findings support the notion of a separation between spatial and temporal features of movement. Stroke patients may fail to integrate the two aspects when executing reaching movements towards visual targets.
Aged
Aged
80 and over
Analysis of Variance
Arm/*physiology
Biomechanics/physiology
Female
Hand/*physiology
*Health
Humans
Male
Middle Aged
Movement/*physiology
Posture/physiology
Principal Component Analysis
Stroke/*physiopathology
Time Factors
PMID:21096047
exported from refbase (https://refbase.nfshost.com/show.php?record=30), last updated on Mon, 31 Dec 2012 14:31:13 +0000
text
http://www.ncbi.nlm.nih.gov/pubmed/21096047
http://www.ncbi.nlm.nih.gov/pubmed/21096047
10.1109/IEMBS.2010.5626297
21096047
Liebermann_etal2010
Conference Proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Conference
Conf Proc IEEE Eng Med Biol Soc
2010
continuing
periodical
academic journal
2010
5242
5245
1557-170X
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