Tanya Anne Mackenzie1, Lee Herrington2, Ian Horlsey3, Ann Cools4. 1. Salford University, Health, Sports and Rehabilitation Sciences, Manchester, United Kingdom/M5 4WT. Electronic address: t.a.mackenzie@edu.salford.ac.uk. 2. Salford University, School of Sport, Exercise and Physiotherapy, Salford, Manchester, United Kingdom. Electronic address: l.c.herrington@salford.ac.uk. 3. English Institute of Sport, Manchester,UK. Electronic address: Ian.Horsley@eis2win.co.uk. 4. Ghent University Dept of Rehabilitation Science and Physiotherapy, Ghent, Belgium. Electronic address: AnnCools@UGent.Be.
Abstract
BACKGROUND: Reduction of the subacromial space as a mechanism in the etiology of shoulder impingement syndromes is debated. Although a reduction in this space is associated with shoulder impingement syndromes, it is unclear if this observation is cause or consequence. METHOD: The purposes of this descriptive review are to provide a broad perspective on the current perceptions with regard to the pathology and pathomechanics of subacromial and internal impingement syndromes, consider the role of the subacromial space in impingement syndromes, describe the intrinsic and extrinsic mechanisms considered to influence the subacromial space, and critique the level of evidence supporting these concepts. FINDING: Based on the current evidence, the hypothesis that a reduction in subacromial space is an extrinsic cause of impingement syndromes is not conclusively established and the evidence permits no conclusion. INTERPRETATION: If maintenance of the subacromial space is important in impingement syndromes regardless of whether it is a cause or consequence, research exploring the correlation between biomechanical factors and the subacromial space, using the later as the outcome measure, would be beneficial.
BACKGROUND: Reduction of the subacromial space as a mechanism in the etiology of shoulder impingement syndromes is debated. Although a reduction in this space is associated with shoulder impingement syndromes, it is unclear if this observation is cause or consequence. METHOD: The purposes of this descriptive review are to provide a broad perspective on the current perceptions with regard to the pathology and pathomechanics of subacromial and internal impingement syndromes, consider the role of the subacromial space in impingement syndromes, describe the intrinsic and extrinsic mechanisms considered to influence the subacromial space, and critique the level of evidence supporting these concepts. FINDING: Based on the current evidence, the hypothesis that a reduction in subacromial space is an extrinsic cause of impingement syndromes is not conclusively established and the evidence permits no conclusion. INTERPRETATION: If maintenance of the subacromial space is important in impingement syndromes regardless of whether it is a cause or consequence, research exploring the correlation between biomechanical factors and the subacromial space, using the later as the outcome measure, would be beneficial.
Authors: Joseph D Mozingo; Mohsen Akbari-Shandiz; Naveen S Murthy; Meegan G Van Straaten; Beth A Schueler; David R Holmes; Cynthia H McCollough; Kristin D Zhao Journal: Clin Biomech (Bristol, Avon) Date: 2019-10-20 Impact factor: 2.063
Authors: Joseph D Mozingo; Mohsen Akbari Shandiz; Felicia M Marquez; Beth A Schueler; David R Holmes; Cynthia H McCollough; Kristin D Zhao Journal: J Biomech Date: 2018-02-13 Impact factor: 2.712
Authors: Joseph D Mozingo; Mohsen Akbari-Shandiz; Meegan G Van Straaten; Naveen S Murthy; Beth A Schueler; David R Holmes; Cynthia H McCollough; Kristin D Zhao Journal: J Electromyogr Kinesiol Date: 2019-08-23 Impact factor: 2.368