A comparison of acromion marker cluster calibration methods for estimating scapular kinematics during upper extremity ergometry

Richardson, R. Tyler; Nicholson, Kristen; Rapp, Elizabeth A.; Johnston, Therese E.; Richards, James G.

doi:10.1016/j.jbiomech.2016.02.052

Cited by 12 publications

(2 citation statements)

References 23 publications

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“…43 Increasing the number of calibration stages for scapular marker clusters placed on the acromion can improve accuracy, but this is not practical for all applications. 44 A recent study sought to improve modeling of scapular kinematics using machine learning algorithms to better predict scapular motion based on 3D video motion capture. 45 Scapular position predicted by the model was within 10 of the positions measured by biplanar fluoroscopy.…”

Section: Future Directionsmentioning

confidence: 99%

Biomechanical Analysis of the Throwing Athlete and Its Impact on Return to Sport

Trasolini

Nicholson

Mylott

et al. 2022

Arthroscopy, Sports Medicine, and Rehabilitation

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Throwing sports remain a popular pastime and frequent source of musculoskeletal injuries, particularly those involving the shoulder and elbow. Biomechanical analyses of throwing athletes have identified pathomechanic factors that predispose throwers to injury or poor performance. These factors, or key performance indicators, are an ongoing topic of research, with the goals of improved injury prediction, prevention, and rehabilitation. Important key performance indicators in the literature to date include shoulder and elbow torque, shoulder rotation, kinetic chain function (as measured by trunk rotation timing and hip-shoulder separation), and lower-extremity mechanics (including stride characteristics). The current gold standard for biomechanical analysis of the throwing athlete involves marker-based 3dimensional) video motion capture. Emerging technologies such as marker-less motion capture, wearable technology, and machine learning have the potential to further refine our understanding. This review will discuss the biomechanics of throwing, with particular attention to baseball pitching, while also delineating methods of modern throwing analysis, implications for clinical orthopaedic practice, and future areas of research interest. Level of Evidence: V, expert opinion.

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Section: Future Directionsmentioning

confidence: 99%

Biomechanical Analysis of the Throwing Athlete and Its Impact on Return to Sport

Trasolini

Nicholson

Mylott

et al. 2022

Arthroscopy, Sports Medicine, and Rehabilitation

Self Cite

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show abstract

“…The acromion marker cluster (AMC) is a skin-based method of tracking scapular motion. This method has proven to be reliable and accurate during humeral elevation below 90° Lempereur et al, 2014;Lempereur et al, 2012;Meskers et al, 2007;van Andel et al, 2009;Warner et al, 2012;Warner et al, 2015) (flexion, abduction, and abduction in the scapular plane) and also in movements such as ergometry (Richardson et al, 2016), humeral external/internal rotation (Chu et al, 2012;Nicholson et al, 2014;van Andel et al, 2009), and movements of daily activities (Nicholson et al, 2014). However, the accuracy of recording scapular motion in activities that include various ranges and combinations of clavicular protraction, retraction, elevation, and depression, independent of humeral movement has not been comprehensively explored (Lawrence et al, 2014;Ludewig et al, 2004;).…”

Section: Introductionmentioning

confidence: 99%

Refining scapulothoracic kinematic measurement and characterising scapulothoracic resting posture in those with and without chronic non-specific neck pain

Bet-Or¹

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Neck pain is a common and recurrent condition affecting between 30 to 50% of adults in any given year. People experiencing neck pain commonly report difficulties in performing activities involving the upper extremity. Furthermore, clinical trials that have included exercises that target the shoulder girdle have shown beneficial effects in reducing neck pain. These observations are feasible based on the biomechanical dependence of the cervical spine and shoulder girdle, which includes common muscle attachments. However, to date there has been a paucity of studies investigating underlying movement disorders of the shoulder girdle in people with neck pain. This is in part due to the challenges of kinematic measurement in this region. The aim of this thesis is to contribute to the literature concerning the role of the shoulder girdle and thorax complex in neck pain from three perspectives. First, the thesis has further refined and informed measurement methods of shoulder girdle and thoracic kinematics (Studies 1-3). Secondly, the thesis further defined normative kinematics of the region with a focus on upright resting posture (Study 4). Thirdly, the thesis explored differences in shoulder girdle and thoracic resting posture in upright standing in those with and without neck pain (Study 5).Advancement in knowledge concerning normal and impaired function of the shoulder girdle has been hindered by challenges related to 3D motion capture of the shoulder girdle and thorax due to skin movement and the complexity of measuring multiple joints and axes of rotation. Therefore, Study1 focused on refining and validating an acromion marker cluster (AMC) method to track scapular movement with the intent of minimising skin movement error. Although the findings of Study 1 indicated that the refined AMC design did not appear to lessen skin movement error compared to previous designs, it was found to be of comparable accuracy (max RMSE 4.45°) and reliability to previous designs (within-session test-retest ICC 0.79-0.99) and appropriate for use in the subsequent thesis studies. In Study 2 the reliability and validity of the AMC method was further evaluated in its capacity to track the scapula at end range clavicular movements (protraction/retraction, elevation/depression). Establishing its measurement accuracy and reliability (max RMSE 6.6°) in these common directions of scapula motion was necessary as it had been previously unstudied. While Studies 1 and 2 focused on optimising the measurement of scapulothoracic kinematics by ensuring the scapula could be tracked accurately, Study 3 focused on refining the measurement of the relationship between the shoulder girdle and the underlying thorax. This study compared thoracic and shoulder girdle postural relationships expressed in the external reference frame to that expressed in the traditionally used ISB recommended thorax reference frame. Using these different frames of iii reference Study 3 also compared measures of thoracic inclination and thoracic curvature. The findings sho...

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Comparison of scapular kinematics from optical motion capture and inertial measurement units during a work-related and functional task protocol

Friesen

Sigurdson

Lang

2023

Med Biol Eng Comput

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A comparison of acromion marker cluster calibration methods for estimating scapular kinematics during upper extremity ergometry

Cited by 12 publications

References 23 publications

Biomechanical Analysis of the Throwing Athlete and Its Impact on Return to Sport

Biomechanical Analysis of the Throwing Athlete and Its Impact on Return to Sport

Refining scapulothoracic kinematic measurement and characterising scapulothoracic resting posture in those with and without chronic non-specific neck pain

Comparison of scapular kinematics from optical motion capture and inertial measurement units during a work-related and functional task protocol

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