Publication: Anticipatory planning of functional reach-to-grasp: a pilot study
Issued Date
2012-10
Resource Type
Language
eng
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Mahidol University
Rights Holder(s)
Sage
Bibliographic Citation
Neurorehabilitation and Neural Repair. Vol.26, No.8 (2012), 957-967
Suggested Citation
Tan, Caroline, Jarugool Tretriluxana, Pitsch, Erica, Nuttakarn Runnarong, Winstein, Carolee J. Anticipatory planning of functional reach-to-grasp: a pilot study. Neurorehabilitation and Neural Repair. Vol.26, No.8 (2012), 957-967. doi:10.1177/1545968312437938 Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/10406
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Title
Anticipatory planning of functional reach-to-grasp: a pilot study
Abstract
Background. Intensive task-oriented training such as constraint-induced movement therapy (CIMT) is thought to engage motor learning and decision-making processes, including anticipatory action planning. Objective. To identify the effects of CIMT on anticipatory hand posture selection and movement time for task-specific reach-to-grasp performance. Methods.
Subacute and chronic poststroke participants were recruited into CIMT (n = 10) or non-CIMT (n = 10) groups. Arm and hand functions were assessed before and after 2 weeks with the Wolf Motor Function Test (WMFT), Motor Activity Log (MAL), and a unique skilled reach-to-grasp task designed to test anticipatory hand posture selection. The reach-to-grasp
tasks included power and precision grasping in 2 conditions achieved optimally with either a pronated (low difficulty) or supinated (high difficulty) hand posture. Outcome measures included success rate, frequency of optimal strategy selection, and movement time. Results. Between-group comparisons revealed a significant treatment effect for WMFT and MAL scores. The CIMT group showed larger gains in success rate, optimal posture selection (precision grasp only), and faster movement times for the supinated conditions. Conclusion. Together, a faster movement time and greater frequency of optimal hand posture selection in the more difficult task condition highlights a set of novel findings. These results provide
evidence for training-induced improvements in upper-extremity function that support neurobehavioral recovery more than
compensation. Although these findings are preliminary in view of the small sample size, the authors suggest that they may
be useful to design and power larger-scale studies to further the understanding of the fundamental mechanisms induced by
task-oriented training interventions in neurorehabilitation.