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KMID : 0950120130120010029
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Jouranl of Korean Orthopaedic Sports Medicine
2013 Volume.12 No. 1 p.29 ~ p.36
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The Proprioceptive Function of Rotator Cuff Tear Patients: Preliminary Report of Pre-operative Function
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Lee Hyun-Il
Heo Jae-Won
Yoo Jae-Chul
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Abstract
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Purpose:Proprioceptive function has been known to be important to shoulder stability. However, the function in rotator cuff tear patients is rarely investigated. The purpose of current study is to report the proprioceptive function in rotator cuff tear patients and to analyze the proprioceptive function regarding the tear size and the presence of subscapularis tear.
Materials and Methods:Between 2011 and 2012, total 76 patients (male 28 and female 48) were recruited and average age was 61.7 years old (range, 38~76). Preoperatively, joint position senses in internal and external rotation were measured for proprioceptive function testing by method of active re-positioning technique. The absolute difference from set point was measured. Proprioceptive function was further analyzed according to tear size of rotator cuff, the presence of subscapularis tear, visual analogue scale of pain, shoulder functional score (American society of elbow and shoulder score), and ranges of motion in shoulder.
Results: The absolute difference for external rotation was 4.9˚±2.9˚in normal joint and 4.9˚±3.0˚ for involved joint in rotator cuff tear patients. This difference was not significant statistically (p=0.87). The absolute difference for internal rotation was 4.0˚±2.7˚in normal joint whereas 4.8˚± 3.7˚for involved joint showing statistically significant difference (p=0.043). There was some trend that the proprioceptive function of internal rotation was more impaired in the bigger tear size group
(more than medium tear) compared to the smaller tear size group (partial thickness and small tear, 5.0 vs. 4.0, p=0.061). The impairment of internal rotation proprioception was also accentuated in patients with subscapularis tear (4.8 vs. 4.0, p=0.065). The proprioceptive function of internal rotation was decreased when the pain visual analogue scale was increased (5.2 vs. 4.0 p=0.04), shoulder functional score was decreased (6.1 vs. 4.2, p=0.005), or range of motion in shoulder joint was restricted (5.3 vs.
3.7, p=0.041).
Conclusion:The deficit of proprioceptive function was observed in rotator cuff tear patients. Proprioception for internal rotation was impaired in patients with the bigger tear size and subscapularis tear. Pain, shoulder function score, and range of motion were also shown to be related with the
deficit in proprioceptive function.
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KEYWORD
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Shoulder , Rotator cuff tear , Proprioception
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Listed journal information
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