| Shoulder Position Sense During Passive Matching and Active Positioning Tasks in Individuals With Anterior Shoulder Instability. | |
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MedLine Citation:
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PMID: 22228608 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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BackgroundAltered neuromuscular control due to compromised joint position sense may contribute to recurrent shoulder instability.ObjectiveThe purpose of the present study was to examine whether individuals with anterior shoulder instability exhibit larger shoulder position sense errors than subjects with healthy shoulders in both passive matching and active positioning.DesignThis was a between-groups study with repeated measures. METHODS:/b>Ten subjects with anterior shoulder instability and 15 subjects with healthy shoulders participated in the study. Shoulder position sense was examined with 3 different protocols (passive motion to remembered shoulder rotation angles, and active shoulder abduction and rotation to verbally specified positions) in both mid- and end-range of motion positions. RESULTS: /b> SUBJECTS:with unstable shoulders exhibited significantly larger errors (by only 1.8° on average) in perception of shoulder position than subjects with healthy shoulders during passive matching. During active positioning, subjects with unstable shoulders were able to voluntarily move the shoulder to verbally specified angles as accurately as subjects with healthy shoulders in both abduction (0.85° difference) and rotation (0.99° difference) tasks. CONCLUSIONS:/b>Results of this study indicate that subjects with unstable shoulders can perceive shoulder angles as accurately as subjects with healthy shoulders in activities with voluntary arm movements. Compared to passive matching, better information from muscle spindles and other sources during voluntary arm movements may compensate for the potential joint position sense deficits after the injury. Therefore, subjects with an unstable shoulder may have adequate neuromuscular control to engage proper protective mechanisms to stabilize the shoulder joint during functional activities. |
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Authors:
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You-Jou Hung; Warren G Darling |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2012-1-6 |
Journal Detail:
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Title: Physical therapy Volume: - ISSN: 1538-6724 ISO Abbreviation: - Publication Date: 2012 Jan |
Date Detail:
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Created Date: 2012-1-9 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0022623 Medline TA: Phys Ther Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Affiliation:
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Y. Hung, PT, PhD, Department of Physical Therapy, Angelo State University, ASU Station 10923, San Angelo, TX 76909 (USA). |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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