Three‐dimensional kinematics of glenohumeral elevation

An, Kai Nan; Browne, Anthony; Korinek, S.; Tanaka, Shinji; Morrey, B.F.

doi:10.1002/jor.1100090117

Cited by 166 publications

(80 citation statements)

References 6 publications

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“…2,[16][17][18][19] There have been, however, few reports about AC motion using cadaver models, 20,21 roentgenography, 2 and the insertion of pins into the bone. 5 Recently, Meskers et al 3 and Pronk et al 4 evaluated in vivo motion of the clavicle and AC joint using 3D electromagnetic tracking systems.…”

Section: Discussionmentioning

confidence: 99%

3D kinematic analysis of the acromioclavicular joint during arm abduction using vertically open MRI

Sahara

Sugamoto

Murai³

et al. 2006

J. Orthop. Res.

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Many researchers have evaluated the motions of the shoulder girdle, especially scapular and humeral motion. However, few reports exist that describe motions of the acromioclavicular joint. The purpose of the present study was to analyze the 3D kinematics of the acromioclavicular joint during arm abduction using 3D MR images obtained by a vertically open MRI. Fourteen shoulders of seven volunteers were examined in seven static positions from 08 to the maximum abduction in a seated position. 3D surface models of the clavicle and scapula were created, and the movements of the acromioclavicular joint from 08 to each position were calculated using the volume-based registration technique. From these calculations, the translations were evaluated and the rotational motions were analyzed using the concept of the screw axis. In the anteroposterior direction, the clavicle translated most posteriorly (À1.9 AE 1.3 mm) at 908 of abduction and most anteriorly (1.6 AE 2.7 mm) at maximum abduction. In the superoinferior direction, the clavicle translated slightly superiorly (0.9 AE 1.9 mm). When analyzing relative motion of the scapula with respect to the clavicle, the scapula generally rotated about a specific screw axis passing through the insertions of both the acromioclavicular and the coracoclavicular ligaments on the coracoid process. The average rotation was 34.9 AE 8.48. ß

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Section: Discussionmentioning

confidence: 99%

3D kinematic analysis of the acromioclavicular joint during arm abduction using vertically open MRI

Sahara

Sugamoto

Murai³

et al. 2006

J. Orthop. Res.

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“…39 A series of matrix transformations was used to describe the position and orientation of the humerus at a given time relative to an initial coincident alignment with the thorax to determine humeral elevation angle relative to the thorax (z, yЈ, zЉ Euler sequence). 3,11 Euler angles de- scribe angular position as a series of 3 rotations about anatomical axes relative to an initial alignment coincident with the thorax coordinate system ( Figure 1). The first rotation is about the thorax vertical axis (Z t ) and defines the plane of elevation.…”

Section: Methodsmentioning

confidence: 99%

“…The third rotation is about the humeral long axis (z h ) and defines internal-external rotation. 3 Humeral elevation angles relative to the thorax determined the independent variable of phases of motion.…”

Section: Methodsmentioning

confidence: 99%

Translations of the Humerus in Persons With Shoulder Impingement Symptoms

Ludewig¹,

Cook

2002

J Orthop Sports Phys Ther

184

134

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Study Design: Two-group mixed-model analysis of covariance and correlation analysis. Objectives: To determine whether differences in humeral translations exist between patients with shoulder impingement symptoms and an asymptomatic comparison group, and if so, to determine if shoulder range-of-motion (ROM) measures are associated with abnormal translations. Background: Abnormal translations of the humeral head are believed to reduce the available subacromial space and to contribute to the development or progression of shoulder impingement symptoms. These abnormal translations have also been theorized to be related to tightness of the posterior capsule and decreased shoulder ROM. Methods and Measures: Three-dimensional humeral translations were tracked in symptomatic construction workers and an asymptomatic comparison group while elevating the arm in the scapular plane under no-load, 2.3-kg, and 4.6-kg hand-load conditions. Between-group comparisons were made across 3 phases of motion (30°-60°, 60°-90°, and 90°-120°) and the association between humeral translations and cross-body adduction and shoulder internal rotation ROM measures were determined by Pearson correlation analysis. Results: Persons with shoulder symptoms demonstrated small but significant changes in anterior-posterior translations of the humerus. These changes for the 90°-120°phase of humeral elevation were moderately negatively associated with available cross-body adduction ROM. Conclusions:The identified kinematic deviations are consistent with possible reductions of the subacromial space. Further study of relationships between posterior capsule tightness, rotator cuff function, and abnormal humeral translations is warranted to better delineate underlying kinematic mechanisms that may contribute to shoulder impingement symptoms and to refine rehabilitation techniques. J Orthop Sports Phys Ther 2002;32:248-259. Keywords: biomechanics, kinematics, shoulder motion abnormalitiesA bnormal kinematics of the shoulder have been associated with shoulder pathologies including impingement, instability, and rotator cuff tears. 27,39,40,63,67 It has been estimated that rotator cuff problems, including impingement and associated rotator cuff tendonitis and bursitis, account for nearly one-third of physician visits for shoulder pain complaints.42 If

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“…[41][42][43][44] This system has been used frequently in shoulder biomechanics research. 37,[45][46][47][48][49] Pilot testing with the FASTRAK system on and off was done with 5 subjects to determine the separation between the FASTRAK transmitter and EMG surface electrodes necessary to prevent electromagnetic artifact in the EMG signal. For all subjects, who maintained a 20.3-cm (8-in) minimum separation during testing, no electromagnetic artifact was detectable in the RMS magnitude or spectral analysis of the EMG signals.…”

Section: Instrumentationmentioning

confidence: 99%

Alterations in Shoulder Kinematics and Associated Muscle Activity in People With Symptoms of Shoulder Impingement

2000

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Background and Purpose. Treatment of patients with impingement symptoms commonly includes exercises intended to restore "normal" movement patterns. Evidence that indicates the existence of abnormal patterns in people with shoulder pain is limited. The purpose of this investigation was to analyze glenohumeral and scapulothoracic kinematics and associated scapulothoracic muscle activity in a group of subjects with symptoms of shoulder impingement relative to a group of subjects without symptoms of shoulder impingement matched for occupational exposure to overhead work. Subjects. Fifty-two subjects were recruited from a population of construction workers with routine exposure to overhead work. Methods. Surface electromyographic data were collected from the upper and lower parts of the trapezius muscle and from the serratus anterior muscle. Electromagnetic sensors simultaneously tracked 3-dimensional motion of the trunk, scapula, and humerus during humeral elevation in the scapular plane in 3 handheld load conditions: (1) no load, (2) 2.3-kg load, and (3) 4.6-kg load. An analysis of variance model was used to test for group and load effects for 3 phases of motion (31°-60°, 61°-90°, and 91°-120°). Results. Relative to the group without impingement, the group with impingement showed decreased scapular upward rotation at the end of the first of the 3 phases of interest, increased anterior tipping at the end of the third phase of interest, and increased scapular medial rotation under the load conditions. At the same time, upper and lower trapezius muscle electromyographic activity increased in the group with impingement as compared with the group without impingement in the final 2 phases, although the upper trapezius muscle changes were apparent only during the 4.6-kg load condition. The serratus anterior muscle demonstrated decreased activity in the group with impingement across all loads and phases. Conclusion and Discussion. Scapular tipping (rotation about a medial to lateral axis) and serratus anterior muscle function are important to consider in the rehabilitation of patients with symptoms of shoulder impingement related to occupational exposure to overhead work. [Ludewig PM, Cook TM. Alterations in shoulder kinematics and associated muscle activity in people with symptoms of shoulder impingement. Phys Ther. 2000;80:276 -291.]

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Three‐dimensional kinematics of glenohumeral elevation

Cited by 166 publications

References 6 publications

3D kinematic analysis of the acromioclavicular joint during arm abduction using vertically open MRI

3D kinematic analysis of the acromioclavicular joint during arm abduction using vertically open MRI

Translations of the Humerus in Persons With Shoulder Impingement Symptoms

Alterations in Shoulder Kinematics and Associated Muscle Activity in People With Symptoms of Shoulder Impingement

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