Abstract
BackgroundIn recent years, there has been a great interest in analyzing upper-limb kinematics in order to investigate scapulohumeral rhythm, as its alteration has been associated with shoulder joint complex injuries. The use of inertial sensors is presented as a convenient and portable analysis method for studying kinematics in terms of angular mobility and linear acceleration. The aim of this study was to analyze upper-limbs kinematics in the three anatomical axes, obtained by inertial sensors.ResultsDescriptive graphics of analytical tasks performed were obtained. The main difference in mobility between the scapula and humerus was found in pitch axis for abduction ({bar{text{X}}} = 107.6°, SD = 9.3°) and flexion ({bar{text{X}}} = 113.1°, SD = 9.3°).ConclusionThe use of inertial sensors for human kinematics analysis is favorable. Although this study identified movement patterns, and supports inertial sensors as a useful device to analyze upper-limb kinematics, further studies with subjects with shoulder pathology to establish differences in movement patterns and scapulohumeral rhythm between healthy and pathological shoulders should be carried out.
Highlights
In recent years, there has been a great interest in analyzing upper-limb kinematics in order to inves‐ tigate scapulohumeral rhythm, as its alteration has been associated with shoulder joint complex injuries
Analyzing six physical properties that corresponded to three continuous quantitative variables allowed us to obtain descriptive graphics of analytical tasks performed by each participant (Fig. 4)
The present study has described and examined shoulder angular mobility and linear acceleration while performing abduction and flexion movements through four inertial sensors placed in humerus, scapula, forearm and sternum in healthy subjects
Summary
There has been a great interest in analyzing upper-limb kinematics in order to inves‐ tigate scapulohumeral rhythm, as its alteration has been associated with shoulder joint complex injuries. The aim of this study was to analyze upper-limbs kinematics in the three anatomical axes, obtained by inertial sensors. There are studies that corroborate that subjects suffering from shoulder injuries, such as impingement syndrome, have differences This leads to the need to demonstrate this in the clinical field, and so, in recent years, there have been investigations concerning the assessment of scapulohumeral rhythm coordination by various devices. The relationship between the humerus and scapula and how they make its motion has been studied by many other techniques, such as optoelectronic systems [17], inclinometers [13], three-dimensional (3D) computerized tomography [18], and calibration anatomical systems techniques [19]
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