Measurement of the Scapular Movements Using the Motion Capture System

Aimi, Takayuki; Nakamura, Yasuo

doi:10.3951/biomechanisms.23.43

Cited by 3 publications

(2 citation statements)

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“…The scapula moves along the dorsal aspect of the rib cage as the upper arm Is raised 7 ) , and the bony landmarks corresponding to the fixed part of the retroreflective markers in the optical motion analysis move significantly as if sliding under the body’s surface. Displacement of the distal end of the acromion reportedly differs only slightly 8 ) , but this error is said to cause the skin movement artifact 20 ) , and it cannot be denied that this may have affected the present study’s results.…”

Section: Discussionmentioning

confidence: 99%

“…Various methods have been developed and proposed to date 6 ) , one of which uses an optical motion analyzer. However, the scapula moves along the dorsal aspect of the thorax as the shoulder joint is raised, and the bone features corresponding to the fixed area of the retroreflective markers in an optical motion analyzer move significantly as if sliding under the body’s surface 7 ) . Thus, consensus is lacking on the methodology for scapular motion analysis using an optical motion analyzer.…”

Section: Introductionmentioning

confidence: 99%

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Validating scapular motion measurements using an optical motion analyzer and gravity magnetic resonance imaging

et al. 2023

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[Purpose] This study aimed to validate whether scapular motion measured using a pad with retroreflective markers and optical motion analyzer (VICON MX) can reflect the motion calculated by images using multi-posture (gravity) magnetic resonance imaging. [Participants and Methods] The participants were 12 healthy males (12 dominant-side shoulders). The measurement items were the scapular angle at shoulder flexion 140° and 160° and abduction 100°, 120°, 140°, and 160°. The scapular angle changes were extracted from the upward/downward and internal/external rotations. Angular changes were calculated by subtracting the scapular angle in static position (drooped upper limb and external shoulder rotation) during resting chair sitting from the scapular angle in each of the six limb positions and subtracting it at shoulder abduction 100° from the scapular angle at shoulder abduction 120°, 140°, and 160°. [Results] The results showed no agreement in most cases and no consistent bias. [Conclusion] The result questions the validity of scapular motion analysis using pads with optical markers. However, the facility environment imposes many study limitations, and this method requires further validation eventually.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%