Defining humeral axial rotation with optical motion capture and inertial measurement units during functional task assessment

Lang, Angelica E.; Friesen, Kenzie B.

doi:10.1007/s11517-023-02894-z

Cited by 2 publications

(3 citation statements)

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“…Humeral elevation was calculated as the angle between the long axes of the torso and humerus as this is the most consistent method to define humeral elevation. Humeral axial rotation was calculated using the True axial rotation method ( 26 , 28 , 33 ). The True axial rotation method is calculated by numerically integrating the humeral angular velocity vector projection onto the humeral longitudinal axis ( 28 ) and has been determined to be the most reliable method for calculated axial rotation using different motion capture methods ( 33 ).…”

Section: Methodsmentioning

confidence: 99%

“…Humeral axial rotation was calculated using the True axial rotation method ( 26 , 28 , 33 ). The True axial rotation method is calculated by numerically integrating the humeral angular velocity vector projection onto the humeral longitudinal axis ( 28 ) and has been determined to be the most reliable method for calculated axial rotation using different motion capture methods ( 33 ). Scapular angles (internal rotation, upward rotation, and tilt) were calculated as Euler angles using the YXZ sequence ( 26 , 34 ).…”

Section: Methodsmentioning

confidence: 99%

“…Trials within each task and participant were averaged and used for the analysis. Scapular and humeral angle waveforms were plotted over defined movement cycles starting at 5 degrees of humeral movement to peak humeral position ( 33 ).…”

Section: Methodsmentioning

confidence: 99%

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Towards in-field assessment of humeral and scapular kinematics: a comparison between laboratory and field settings using inertial sensors

Lordall,

Akinluyi,

Lang

2024

Front. Sports Act. Living

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IntroductionInertial measurement units allow for quantitative assessment of body motion in many environments. Determining the ability to measure upper limb motion with inertial measurement units, leveraging procedures traditionally used in the lab such as scapular calibration procedures and humeral axial rotation calculation, would expand the opportunities to assess upper limb function in externally valid environments. This study examined if humeral and scapular motion measured in different field settings is consistent with motion measured in a lab setting in similar tasks.MethodsTwenty-eight adults participated in the study (14 field setting, 14 lab setting). Three different types of field settings were included: home (n = 5), work (n = 4), and sports (n = 5). Field participants were matched to lab participants based on sex and body height. All participants were equipped with five inertial and magnetic measurement units (Xsens Awinda, Xsens Technlogies, NL, Fs = 100 Hz) on the torso, humeri, and scapulae. Humeral and scapular angles were measured during a functional task protocol consisting of seven tasks. Data from all three field settings were combined. Statistical parametric mapping (α = .05) was used to assess differences in waveforms between the lab and field data.Results and discussionFive out of seven tasks displayed no differences for humeral elevation and humeral axial rotation, while scapular upward rotation and tilt were not statistically different for any tasks. Scapular internal rotation variability was very high for the field setting, but not for the lab setting. Task-based differences in humeral elevation and humeral axial rotation may be related to equipment modifications for the field protocol and between subjects' variability in task performance. Data indicate that humeral elevation, humeral axial rotation, and scapular upward rotation can be measured in externally valid field settings, which is promising for the evaluation of upper limb movement in natural environments.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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Towards in-field assessment of humeral and scapular kinematics: a comparison between laboratory and field settings using inertial sensors

Lordall,

Akinluyi,

Lang

2024

Front. Sports Act. Living

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Do Sex and Age Influence Scapular and Thoracohumeral Kinematics During a Functional Task Protocol?

Waslen,

Friesen,

Lang

2024

Journal of Applied Biomechanics

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There is mixed evidence on the role that biological sex plays in shoulder biomechanics despite known differences in musculoskeletal disorder prevalence between males and females. Additionally, advancing age may contribute to shoulder kinematic changes. The purpose of this study was to determine if sex and age influenced scapular and thoracohumeral kinematics during a range of functional tasks. Sixty healthy participants aged 19–63 years (30 males; 30 females) completed a functional task protocol while their upper limb motion was recorded. Scapular and humeral angles were calculated and compared with multiple linear regressions to assess the interaction effects of sex and age. Shoulder kinematics were not different between sex and age groups for many of the functional tasks. However, females had lower humeral external rotation in the overhead lift task (15°, P < .001), and less scapular anterior tilt angles in the forward transfer task (6°, P < .001) than males. Age was positively associated with humeral elevation (R2 = .330, P < .001) and scapular rotation (R2 = .299, P < .001) in the Wash Axilla task. There exist some kinematic differences between sex and with advancing age for select functional tasks, which should be considered for musculoskeletal disorder development.

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Defining humeral axial rotation with optical motion capture and inertial measurement units during functional task assessment

Cited by 2 publications

References 36 publications

Towards in-field assessment of humeral and scapular kinematics: a comparison between laboratory and field settings using inertial sensors

Towards in-field assessment of humeral and scapular kinematics: a comparison between laboratory and field settings using inertial sensors

Do Sex and Age Influence Scapular and Thoracohumeral Kinematics During a Functional Task Protocol?

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