Reduced force entropy in subacromial pain syndrome: A cross-sectional analysis.

摘要: Abstract Background Generating a force at the hand requires moments about multiple joints by theoretically infinite number of arm and shoulder muscle combinations. This allows for learning adaptation can possibly be captured using complexity (entropy) an isometrically generated curve. Patients with Subacromial Pain Syndrome have difficulty to explore alternative, pain-avoiding, motor strategies we questioned whether loss may contribute this. We assessed patients reduced entropy abduction adduction Methods Forty thirty controls submaximal isometric ab- wrist. The curve was characterized magnitude variability [standard deviation coefficient variation], (complexity) [approximate entropy]. Findings showed both during (−0.16, confidence interval: [−0.33; −0.00], p: 0.048) task (−0.20, [−0.37; −0.03], 0.024) (standard deviation: −0.006, [−0.011; −0.001], 0.013 variation: −0.51, [−0.93; −0. 10], 0.016). Interpretations Isometric curves show compared asymptomatic controls, which indicate more narrow stereotype use options. In future studies, it should investigated finding (motor) indicates functional decline, contributing decreased ability acquire optimize in Syndrome. Level evidence II prognostic study.