Distance between rotator cuff footprints and the acromion, coracoacromial ligament, and coracoid process during dynamic arm elevations: Preliminary observations

Maso, Fabien Dal; Blache, Yoann; Raison, Maxime; Arndt, Anton; Begon, Mickaël

doi:10.1016/j.math.2016.03.002

Cited by 6 publications

(2 citation statements)

References 26 publications

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“…In vivo studies investigating subacromial proximities during humeral elevation generally report the acromiohumeral distance progressively decreases with increasing humeral elevation until a minimum occurs between approximately 75 • ---120 • of humerothoracic elevation before increasing again at higher angles (Table 2). However, most of these studies quantified acromiohumeral distances, 7,29,38,39,45,47,53 which hinders clinical interpretation.…”

Section: In Vivo Studiesmentioning

confidence: 99%

Shoulder kinematics impact subacromial proximities: a review of the literature

Lawrence

Braman

Ludewig

2020

Brazilian Journal of Physical Therapy

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Background: Alterations in glenohumeral and scapulothoracic kinematics have been theorized to contribute to rotator cuff pathology by impacting the magnitude of the subacromial space. Objective: The purpose of this review is to summarize what is currently known about the relationship between shoulder kinematics and subacromial proximities. Conclusions: A variety of methods have been used to quantify subacromial proximities including photographs, MR imaging, ultrasonography, and single-and bi-plane radiographs. Changes in glenohumeral and scapulothoracic kinematics are associated with changes in subacromial proximities. However, the magnitude and direction of a particular motion's impact on subacromial proximities often vary between studies, which likely reflects different methodologies and subject populations. Glenohumeral elevation angle has been consistently found to impact subacromial proximities. Plane of humeral elevation also impacts subacromial proximities but to a lesser degree than the elevation angle. The impact of decreased scapulothoracic upward rotation on subacromial proximities is not absolute, but instead depends on the angle of humerothoracic elevation. The effects of scapular dyskinesis and humeral and scapular axial rotations on subacromial proximities are less clear. Future research is needed to further investigate the relationship between kinematics and subacromial proximities using more homogenous groups, determine the extent to which compression and other factors contribute to rotator cuff pathology, and develop accurate and reliable clinical measures of shoulder motion.

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Section: In Vivo Studiesmentioning

confidence: 99%

Shoulder kinematics impact subacromial proximities: a review of the literature

Lawrence

Braman

Ludewig

2020

Brazilian Journal of Physical Therapy

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“…Mechanical impingement was defined as distance between a tendon insertion and the CA arch that was less than the tendon thickness. Although the focus of previous work related to impingement has mainly involved the supraspinatus tendon and acromion in able-bodied individuals, there is evidence that the infraspinatus and subscapularis tendons and the CA ligament and coracoid may also be involved (Dal Maso et al, 2016). For this reason, each of these structures was considered in the present study.…”

Section: Introductionmentioning

confidence: 99%

Shoulder mechanical impingement risk associated with manual wheelchair tasks in individuals with spinal cord injury

Mozingo

Akbari-Shandiz

Murthy

et al. 2020

Clinical Biomechanics

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Background-Most individuals with spinal cord injury who use manual wheelchairs experience shoulder pain related to wheelchair use, potentially in part from mechanical impingement of soft tissue structures within the subacromial space. There is evidence suggesting that scapula and humerus motion during certain wheelchair tasks occurs in directions that may reduce the subacromial space, but it hasn't been thoroughly characterized in this context. Methods-Shoulder motion was imaged and quantified during scapular plane elevation with/ without handheld load, propulsion with/without added resistance, sideways lean, and weight-relief raise in ten manual wheelchair users with spinal cord injury using biplane fluoroscopy and computed tomography. For each position, minimum distance between rotator cuff tendon insertions (infraspinatus, subscapularis, supraspinatus) and the coracoacromial arch was determined. Tendon thickness was measured with ultrasound, and impingement risk scores were defined for each task based on frequency and amount of tendon compression.Findings-Periods of impingement were identified during scapular plane elevation and propulsion but not during pressure reliefs in most participants. There was a significant effect of activity on impingement risk scores (P< 0.0001), with greatest impingement risk during scapular plane elevation followed by propulsion. Impingement risk scores were not significantly different between scapular plane elevation loading conditions (P= 0.202) or propulsion resistances (P= 0.223). The infraspinatus and supraspinatus tendons were both susceptible to impingement during *

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