Document Detail

Measurement of upper limb kinematics and joint angle patterns during deep brain stimulation for parkinson's disease.
MedLine Citation:
PMID:  19963508     Owner:  NLM     Status:  MEDLINE    
Therapeutic benefits of subthalamic nucleus (STN) deep brain stimulation (DBS) for motor symptoms of Parkinson's disease (PD) are well-documented. However, the mechanisms underlying motor improvement with DBS remain poorly understood. We tested the hypothesis that STN-DBS-related improvements in voluntary arm movement kinematics are mediated by changes in the velocity and temporal sequencing of proximal joint angles. We evaluated a 56 year old male and 66 year old female with idiopathic Parkinson's disease chronically implanted with bilateral STN-DBS. Patients performed a button press task while off medication in the DBS-on and DBS-off conditions. Movements of the upper limb were recorded using a 3D motion analysis system, and detailed kinematic measures were obtained for the arm and forearm. As expected, reaction and movement times were improved in the DBS-on compared to DBS-off condition. The two subjects differed with regards to the magnitude of their changes in peak linear velocity and peak angular velocities (shoulder flexion extension, shoulder abduction adduction and elbow flexion extension). Surprisingly, both PD patients increased the frequency with which they used a preferred sequence of shoulder and elbow joint activations when in the DBS-on condition. This preferred pattern was adopted with twice the frequency than in the DBS-off condition, and with increased frequency relative to a control group of 9 age-matched controls. These results suggest that STN-DBS may improve movement execution at the cost of flexibility in movement execution strategy.
V J Khandwala; M A Burack; J W Mink; G T Gdowski; M J Gdowski
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Conference proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual Conference     Volume:  2009     ISSN:  1557-170X     ISO Abbreviation:  Conf Proc IEEE Eng Med Biol Soc     Publication Date:  2009  
Date Detail:
Created Date:  2009-12-07     Completed Date:  2010-03-25     Revised Date:  2014-08-21    
Medline Journal Info:
Nlm Unique ID:  101243413     Medline TA:  Conf Proc IEEE Eng Med Biol Soc     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1553-6     Citation Subset:  IM    
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MeSH Terms
Arm / physiology*
Biomechanical Phenomena*
Deep Brain Stimulation*
Middle Aged
Parkinson Disease / physiopathology,  therapy*
Grant Support

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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