Related Experiment Video
Updated: Nov 28, 2025
06:09
Measuring 3D In-vivo Shoulder Kinematics using Biplanar Videoradiography
Published on: March 12, 2021
3.5K
Shoulder movement complexity in the aging shoulder: A cross-sectional analysis and reliability assessment
Celeste L Overbeek1,2, Timon H Geurkink1,2, Fleur A de Groot2
1Department of Orthopaedics, Leiden University Medical Center, Leiden, The Netherlands.
Summary
As people age, shoulder movements become less complex, potentially increasing susceptibility to shoulder issues. Movement complexity analysis offers insights into aging motor control and shoulder health.
Area of Science:
- Biomechanics
- Gerontology
- Motor Control
Background:
- Motor redundancy in healthy individuals allows for adaptability and efficient muscle use.
- Movement complexity assessment may reveal age-related changes in motor control.
- Aging is associated with potential declines in motor function and increased risk of musculoskeletal complaints.
Purpose of the Study:
- To quantify movement complexity in repetitive arm elevation trajectories in the aging shoulder.
- To assess the test-retest reliability of movement complexity quantification.
- To investigate the association between age and movement complexity in shoulder movements.
Main Methods:
- A cross-sectional study involving 120 asymptomatic participants aged 18-70 years.
- 3D-electromagnetic tracking to record repetitive arm abduction and forward/anteflexion movements.
- Movement complexity calculated using Approximate Entropy (ApEn), with reliability assessed via ICC.
Main Results:
- Higher age was significantly associated with lower ApEn-values during shoulder abduction (p < .001).
- Test-retest reliability varied, influenced by sample length differences.
- Results suggest a trend towards more stereotypical abduction movements with increasing age.
Conclusions:
- Aging is linked to reduced complexity in shoulder abduction movements, potentially indicating decreased motor redundancy.
- This reduction in movement complexity may predispose the aging shoulder to complaints.
- Movement complexity analysis, considering factors like sample length, could be valuable for future research on shoulder pathologies.
More Related Videos
Related Concept Videos
01:23Muscles of the Shoulder
8.2K
The muscles surrounding the shoulder girdle, including the clavicle and scapula, primarily stabilize the scapula. This stable base allows other muscles to move the humerus effectively. Scapular movements often mirror those of the humerus and extend its range of motion. For instance, raising the arm above the head would not be feasible without simultaneous upward rotation of the scapula.
Anterior Thoracic Muscles
The anterior thoracic muscles include the serratus anterior, subclavius, and...
Anterior Thoracic Muscles
The anterior thoracic muscles include the serratus anterior, subclavius, and...
8.2K
01:09Changes in the Appendicular Skeleton with Age
3.2K
The upper and lower limb initially develops as a small bulge called a limb bud, which appears on the lateral side of the early embryo. The upper limb bud appears near the end of the fourth week of development, with the lower limb bud appearing shortly after.
Initially, the limb buds consist of a core of mesenchyme covered by a layer of ectoderm. The ectoderm at the end of the limb bud thickens to form a narrow crest called the apical ectodermal ridge. This ridge stimulates the underlying...
Initially, the limb buds consist of a core of mesenchyme covered by a layer of ectoderm. The ectoderm at the end of the limb bud thickens to form a narrow crest called the apical ectodermal ridge. This ridge stimulates the underlying...
3.2K
00:51Anatomical Movements
14.1K
Anatomical movements refer to the various actions or motions that can be performed by the body's joints and muscles. These movements are described using specific terms to provide a standardized way of discussing and understanding the range of motion at different joints.
Here are some common anatomical movements:
Flexion and extension motions are in the sagittal (anterior–posterior) plane of motion. These movements take place at the shoulder, hip, elbow, knee, wrist,...
Here are some common anatomical movements:
Flexion and extension motions are in the sagittal (anterior–posterior) plane of motion. These movements take place at the shoulder, hip, elbow, knee, wrist,...
14.1K