Three-Dimensional Acromioclavicular Joint Motions During Elevation of the Arm

Teece, Rachael M.; Lunden, Jason B.; Lloyd, Angela S.; Kaiser, Andrew P.; Cieminski, Cort J.; Ludewig, Paula M.

doi:10.2519/jospt.2008.2386

Cited by 106 publications

(93 citation statements)

References 26 publications

(52 reference statements)

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“…It has recently been suggested that clavicle elevation may be coupled with scapular anterior tilt where increased elevation of the clavicle is coupled with increased anterior tilting of the scapula. 47 This abnormality may reflect inefficiency in the action of the serratus anterior and lower trapezius, failing to generate normal posterior tilt and prevent excessive elevation of the scapula. 27,30,41 The contribution of the middle trapezius may also be important to reduce clavicle elevation, as it has been demonstrated that a voluntary reduction of the upper trapezius activity, when the arm is elevated, increases mainly the activity of the rhomboids, the middle trapezius, and the serratus anterior.…”

Section: Discussionmentioning

confidence: 99%

Altered Scapular Orientation During Arm Elevation in Patients With Insidious Onset Neck Pain and Whiplash-Associated Disorder

Helgadottir¹,

Kristjansson²,

Mottram³

et al. 2010

J Orthop Sports Phys Ther

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Section: Discussionmentioning

confidence: 99%

Altered Scapular Orientation During Arm Elevation in Patients With Insidious Onset Neck Pain and Whiplash-Associated Disorder

Helgadottir¹,

Kristjansson²,

Mottram³

et al. 2010

J Orthop Sports Phys Ther

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“…Because bone pin placement is an invasive procedure, with many risks, a reasonable alternative is capturing passive motion using cadaver specimens. Teece and colleagues captured both active (in vivo) and passive (cadaver) movement patterns of the AC joint (Teece et al, 2008). The movement patterns of the AC joint were consistent for each rotation (upward rotation, internal rotation and posterior tilting) between active and passive conditions, though there was an offset in the values for upward rotation and posterior tilting which the authors attributed to a lack of active muscle tension.…”

Section: Limitationsmentioning

confidence: 99%

“…Results from this analysis were used to improve the accuracy of the surface sensor measurements by developing correction equations for clavicle rotations with statistical differences between sensors. In current research of 3D clavicle motion (Teece et al, 2008), it is standard procedure to post-process the clavicle z-axis so using the results from this ANOVA to develop a correction equation is more applicable for future clavicle and shoulder studies.…”

Section: Correcting Surface Sensor Measurementsmentioning

confidence: 99%

“…Based on previously described recommendations (Wu et al, 2005), the clavicle z-axis was oriented vertically, aligned with the thoracic z-axis in the resting position. The custom designed triangular reference frame-oriented the clavicle z-axis near vertical; however for situations where the clavicle z-axis deviated from the thoracic z-axis, post-processing was done to realign the axes (Teece et al, 2008). To post-process this axis, the resting value of clavicle axial rotation was calculated and the inverse of this value was used to develop a correction rotations matrix.…”

Section: Data Reductionmentioning

confidence: 99%

“…The two ends of the base of the triangle were placed at the SC and AC joints and the triangle was levelled in the vertical plane ( Figure 3). The apex of the levelled triangle was digitised as the third point (Teece et al, 2008). The plane of the clavicle is then created using the third point and the points digitised at the SC and AC joints.…”

Section: Data Reductionmentioning

confidence: 99%

See 2 more Smart Citations

Capturing three-dimensional clavicle kinematics: a validation of surface sensor measurements

Szucs

Borstad

2015

IJECB

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Despite conclusions from previous research that clavicle rotation is necessary for normal shoulder motion, dynamic clavicle rotations are rarely included in shoulder studies. This is likely due to the difficult nature in capturing clavicle motion. The purpose of this study was to determine the validity of non-invasive electromagnetic measures of dynamic clavicle motion against bone pin measurements. 3D rotations of the clavicle were collected simultaneously from a surface sensor and bone pin mounted sensor from six cadaveric shoulders. Intraclass correlation coefficients (ICCs) were calculated to determine the validity of the surface sensor measurements compared to the bone pin measurements. It was determined that the electromagnetic surface sensor accurately tracks retraction and elevation, but underestimates axial rotation. A mathematical equation was developed to improve the fit of surface sensor values for axial rotation. The strong ICC values for each clavicle rotation suggest that the surface sensor has utility in future shoulder research.

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Anatomical observations of the human acromioclavicular joint

et al. 2014

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The condition of the acromioclavicular joint (ACJ) is considered to be one factor in the etiology of shoulder impingement syndrome, but there are few supporting morphological data. Fifty-two sides of 35 cadavers were investigated macroscopically and histologically using Safranin O, Fast green, and Weigert's iron hematoxylin staining. The ACJs were classified into three major types depending on the presence or absence of the articular disk. In type 1, the articular disk divided the articular cavity completely (n = 2; 3.8%). In type 2, the articular disk was incomplete and divided the joint cavity incompletely (n = 13; 25%). Type 2 was further divided into subtypes 2a and 2b depending on the configurations of the articular facets. In type 3, no articular disk was found in the joint cavity (n = 37; 71.2%). Type 3 was further divided into subtypes 3a, 3b, and 3c depending on the configurations of the articular surfaces. Fewer than half of the ACJ specimens (22/52 or 42.3%) demonstrated an ellipsoid character in which axial rotation was limited. Histological observation revealed that the upper part of the articular disk of the ACJ comprised fibrocartilage while the lower part comprised dense connective tissue. In cases where the ACJ appears to be an ellipsoid joint, its limited axial rotation restricts posterior tilting of the scapula during arm elevation, which could contribute to shoulder impingement syndrome.

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Three-Dimensional Acromioclavicular Joint Motions During Elevation of the Arm

Cited by 106 publications

References 26 publications

Altered Scapular Orientation During Arm Elevation in Patients With Insidious Onset Neck Pain and Whiplash-Associated Disorder

Altered Scapular Orientation During Arm Elevation in Patients With Insidious Onset Neck Pain and Whiplash-Associated Disorder

Capturing three-dimensional clavicle kinematics: a validation of surface sensor measurements

Anatomical observations of the human acromioclavicular joint

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