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Neurorehabilitation and Neural Repair
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*Arm Injuries and Disorders
*Stroke
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Targeted Aiming Movements Are Compromised in Nonaffected Limb of Persons With Stroke

Caroline J. Ketcham, PhD

Motor Control Laboratory, Department of Health and Kinesiology, Texas A&M University, College Station, ketcham{at}hlkn.tamu.edu

Tiffany M. Rodriguez

Motor Control Laboratory, Department of Health and Kinesiology, Texas A&M University, College Station

Kirk A. Zihlman, MS

Motor Control Laboratory, Department of Health and Kinesiology, Texas A&M University, College Station

Background. Research has shown that movement impairments following stroke are typically associated with the limb contralateral to the side of the stroke. Prior studies identified ipsilateral motor declines across a variety of tasks. Objective. Two experiments were conducted to better understand the ipsilateral contributions to organization and execution of proximal upper extremity multisegment aiming movements in persons with right-hemispheric stroke. Methods. Participants performed reciprocal aiming (Experiment 1) and 2-segment aiming movements (Experiment 2) on a digitizing tablet. In both experiments, target size and/or target orientation were manipulated to examine the influence of accuracy constraints on the planning and organization of movements. Results. Kinematic measures, submovement analysis, and harmonicity measures were included in this study. Declines in organization and execution of multisegment movements were found to contribute to performance decrements and slowing in stroke patients. Furthermore, stroke patients were unable to efficiently plan multisegment movements as one functional unit, resulting in discrete movements. Conclusions . Results suggest the importance of considering ipsilateral contributions to the control and organization of targeted aiming movements as well as implications for rehabilitation and recovery.

Key Words: Kinematics • Hemispheric control • Planning • Organization.

References

This version was published on October 1, 2007

Neurorehabilitation and Neural Repair, Vol. 21, No. 5, 388-397 (2007)
DOI: 10.1177/1545968306297872
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This article has been cited by other articles:


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 Neurorehabil Neural RepairHome page
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Neurorehabil Neural Repair, June 1, 2009; 23(5): 435 - 440.
[Abstract] [PDF]

This Article
Right arrow Abstract Freely available
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Right arrow Alert me when this article is cited
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Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via Google Scholar
Right arrow Citing Articles via Scopus
Google Scholar
Right arrow Articles by Ketcham, C. J.
Right arrow Articles by Zihlman, K. A.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Ketcham, C. J.
Right arrow Articles by Zihlman, K. A.
Right arrowPubmed/NCBI databases
Medline Plus Health Information
*Arm Injuries and Disorders
*Stroke
Social Bookmarking
Add to CiteULike   Add to Complore   Add to Connotea   Add to Del.icio.us   Add to Digg   Add to Reddit   Add to Technorati   Add to Twitter  
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