Posture-Dependent Neuromuscular Contributions to Three-Dimensional Isometric Shoulder Torque Generation: Supplemental Tables

Supplemental Tables 1-5 for manuscript submission.Table captions are listed below:Supplemental Table 1: Surface electromyography electrode placement. Electrodes were placed with participants arms in the anatomical position unless otherwise noted. Distances included in the descriptions of locations are approximations which were subject to change depending on individual anatomy.Supplemental Table 2: Fixed effects parameters for the linear mixed effects models describing associations between computed similarity indices and covariates. The reference condition for these models was the shoulder with a plane of elevation angle of 0° and elevated 45°. Reported as mean ± standard deviation. LL – log-likelihood. Supplemental Table 3: Main effects statistics for the linear mixed effects models describing associations between computed similarity indices and covariates. Bolded terms indicate significance at p < 0.05. Supplemental Table 4: Fixed effects parameters for the linear mixed effects models describing associations between muscle weighted contributions and covariates. The reference condition for these models was the shoulder with a plane of elevation angle of 0°, elevated 45°, and synergy cluster 1. Reported as mean ± standard deviation. Abbreviations: SC: sternocostal fiber region of pectoralis major, CL: clavicular fiber region of pectoralis major, AD: anterior deltoid, MD: medial deltoid, PD: posterior deltoid, UT: upper trapezius, MT: middle trapezius, LT: lower trapezius, LD: latissimus dorsi, TM: teres major, IF: infraspinatus, SA: serratus anterior, BI: biceps brachii long head, BR: brachioradialis, TriLg: triceps brachii long head, TriLt: triceps brachii lateral head, POE – plane of elevation; Elev – elevation; Rot – rotation; LL – log-likelihood Supplemental Table 5: Main effects statistics for the linear mixed effects models describing associations between muscle weights derived from the muscle synergy analysis and covariates. Bolded terms indicate significance at p < 0.05. Abbreviations: SC: sternocostal fiber region of pectoralis major, CL: clavicular fiber region of pectoralis major, AD: anterior deltoid, MD: medial deltoid, PD: posterior deltoid, UT: upper trapezius, MT: middle trapezius, LT: lower trapezius, LD: latissimus dorsi, TM: teres major, IF: infraspinatus, SA: serratus anterior, BI: biceps brachii long head, BR: brachioradialis, TriLg: triceps brachii long head, TriLt: triceps brachii lateral head.