1
|
Beecher G, Dyck PJB, Zochodne DW. Axillary and musculocutaneous neuropathies. HANDBOOK OF CLINICAL NEUROLOGY 2024; 201:135-148. [PMID: 38697736 DOI: 10.1016/b978-0-323-90108-6.00004-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2024]
Abstract
This chapter covers axillary and musculocutaneous neuropathies, with a focus on clinically relevant anatomy, electrodiagnostic approaches, etiologic considerations, and management principles. Disorders of the lateral antebrachial cutaneous nerve, a derivative of the musculocutaneous nerve, are also reviewed. We emphasize the importance of objective findings, including the physical examination and electrodiagnostic evaluation in confirming the isolated involvement of each nerve which, along with the clinical history, informs etiologic considerations. Axillary and musculocutaneous neuropathies are both rare in isolation and most frequently occur in the setting of trauma. Less commonly encountered etiologies include external compression or entrapment, neoplastic involvement, or immune-mediated disorders including neuralgic amyotrophy, postsurgical inflammatory neuropathy, multifocal motor neuropathy, vasculitic neuropathy, and multifocal chronic inflammatory demyelinating polyradiculoneuropathy.
Collapse
Affiliation(s)
- Grayson Beecher
- Division of Neuromuscular Medicine, Department of Neurology, Mayo Clinic, Rochester, MN, United States; Neuroscience and Mental Health Institute and Division of Neurology, Department of Medicine, University of Alberta, Edmonton, AB, Canada
| | - P James B Dyck
- Division of Neuromuscular Medicine, Department of Neurology, Mayo Clinic, Rochester, MN, United States; Peripheral Neuropathy Research Laboratory, Mayo Clinic, Rochester, MN, United States
| | - Douglas W Zochodne
- Neuroscience and Mental Health Institute and Division of Neurology, Department of Medicine, University of Alberta, Edmonton, AB, Canada.
| |
Collapse
|
2
|
Chaudhry TA, Doedtman AM, Wellman E, Stanton D. Quadrilateral space syndrome induced by a large degenerative osteophyte. Radiol Case Rep 2021; 16:2593-2600. [PMID: 34285727 PMCID: PMC8278156 DOI: 10.1016/j.radcr.2021.06.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2021] [Revised: 06/01/2021] [Accepted: 06/02/2021] [Indexed: 11/13/2022] Open
Abstract
A 41-year-old gentleman presented with decreased range of motion. Initial radiographs demonstrated extensive osteoarthritic changes involving the glenohumeral joint with a large inferior oriented osteophyte. Subsequent MRI of the shoulder was obtained which demonstrated isolated fatty atrophy of the teres minor and, to a lesser extent, deltoid muscles. The axillary nerve was visualized entering the quadrilateral space which, although, was severely narrowed secondary to the large osteophyte. The patient's clinical symptoms and MRI findings were consistent with quadrilateral space syndrome. The patient wanted to attempt conservative therapy first; and therefore, subsequently underwent physical therapy with improvement of shoulder strength and range of motion.
Collapse
Affiliation(s)
- Thymur Ali Chaudhry
- Department of Diagnostic Radiology, Southern Illinois University School of Medicine, 800 E. Carpenter Street, Box 43, Room 1F084, Springfield, IL 62769 USA
| | - Adam M Doedtman
- Department of Diagnostic Radiology, Southern Illinois University School of Medicine, 800 E. Carpenter Street, Box 43, Room 1F084, Springfield, IL 62769 USA
| | - Elek Wellman
- Department of Diagnostic Radiology, Southern Illinois University School of Medicine, 800 E. Carpenter Street, Box 43, Room 1F084, Springfield, IL 62769 USA
| | - Daniel Stanton
- Department of Diagnostic Radiology, Southern Illinois University School of Medicine, 800 E. Carpenter Street, Box 43, Room 1F084, Springfield, IL 62769 USA.,Central Illinois Radiological Associates, Ltd. at Saint John's Hospital, 800 E. Carpenter St., Springfield, IL 62769, USA
| |
Collapse
|
3
|
Zhang J, Zhang T, Wang R, Wang T. Musculoskeletal ultrasound diagnosis of quadrilateral space syndrome: A case report. Medicine (Baltimore) 2021; 100:e24976. [PMID: 33725866 PMCID: PMC7969238 DOI: 10.1097/md.0000000000024976] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/20/2020] [Accepted: 02/11/2021] [Indexed: 01/05/2023] Open
Abstract
INTRODUCTION Quadrilateral space syndrome (QSS) is a peripheral nerve entrapment disease, which can be misdiagnosed in clinic. In the past, QSS was mainly diagnosed by clinical symptoms combined with magnetic resonance imaging (MRI), electromyography (EMG), and arterial angiography. There are few reports on the diagnosis of QSS by musculoskeletal ultrasound (MSKUS) combined with clinical symptoms. PATIENT CONCERNS A middle-aged female patient had posterolateral pain and numbness in her right shoulder for 2 months. DIAGNOSES At first, she was diagnosed as suprascapular nerve entrapment, while EMG of suprascapular nerve and axillary nerve indicated that nerve conduction was normal. Then, MRI was performed, showing the shoulder had no abnormalities, and EMG and arterial angiography of upper limb showed no abnormalities too. Finally, she was diagnosed as QSS according to MSKUS and lidocaine block test. INTERVENTIONS Two sealing treatments of axillary nerve block in quadrilateral space under the guidance of MSKUS were performed. OUTCOMES After 2 treatments, the pain and numbness in her shoulder disappeared, and her shoulder could move normally. There was no recurrence after 3 months of follow-up. CONCLUSION MSKUS is an effective method to diagnose QSS. It is fast, convenient and inexpensive, and is worth popularizing in clinic.
Collapse
|
4
|
Kemp TD, Kaye TR, Scali F. Quadrangular Space Syndrome: A Narrative Overview. J Chiropr Med 2021; 20:16-22. [PMID: 34025301 PMCID: PMC8134859 DOI: 10.1016/j.jcm.2021.01.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2019] [Revised: 08/01/2020] [Accepted: 01/27/2021] [Indexed: 10/21/2022] Open
Abstract
OBJECTIVE The purpose of this narrative review of the literature is to provide an overview of quadrangular space syndrome with special attention to its clinical presentation, differential diagnosis, and treatment. METHODS A narrative review of the English-language, peer-reviewed literature was performed using the key words "axillary nerve," "quadrangular space," "quadrilateral space," and "posterior humeral circumflex artery." Databases searched were Medline Complete, Cumulative Index to Nursing and Allied Health Literatures, and Index to Chiropractic Literature. The search period was from 1983 through January 2020. RESULTS There were 85 articles selected for this review. A summary and overview are provided. CONCLUSION Quadrangular space syndrome is an uncommon cause of shoulder pain. Clinicians should consider it as a diagnosis after ruling out more common shoulder conditions and examining other concurrent diseases.
Collapse
Affiliation(s)
- Tyler D. Kemp
- College of Chiropractic, Logan University, Ballwin, Missouri
| | - Tyler R. Kaye
- College of Chiropractic, Logan University, Ballwin, Missouri
| | - Frank Scali
- School of Medicine, California University of Science and Medicine, School of Medicine, Colton, California
| |
Collapse
|
5
|
Hong CC, Thambiah MD, Manohara R. Quadrilateral space syndrome: The forgotten differential. J Orthop Surg (Hong Kong) 2020; 27:2309499019847145. [PMID: 31079528 DOI: 10.1177/2309499019847145] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
The quadrilateral space is bounded by the teres minor superiorly, the teres major inferiorly, the long head of the triceps medially and the shaft of the humerus laterally. The axillary nerve and posterior circumflex humeral artery pass through this space to enter the posterior compartment of the upper arm. Quadrilateral space syndrome (QSS) is caused by entrapment of the axillary nerve or its main branches and/or the posterior circumflex humeral artery in the quadrilateral space by internal or external compression. QSS can often be difficult to diagnose, given that patients may present with non-specific symptoms. As such, patients may be misdiagnosed with more common disorders of the shoulder. We report a case of QSS masquerading initially as rotator cuff pathology with positive impingement signs.
Collapse
Affiliation(s)
- Choon Chiet Hong
- Department of Orthopaedic Surgery, University Orthopaedic, Hand and Reconstructive Microsurgery Cluster, National University Hospital, Singapore
| | - Matthew Dhanaraj Thambiah
- Department of Orthopaedic Surgery, University Orthopaedic, Hand and Reconstructive Microsurgery Cluster, National University Hospital, Singapore
| | - Ruben Manohara
- Department of Orthopaedic Surgery, University Orthopaedic, Hand and Reconstructive Microsurgery Cluster, National University Hospital, Singapore
| |
Collapse
|
6
|
Flynn LS, Wright TW, King JJ. Quadrilateral space syndrome: a review. J Shoulder Elbow Surg 2018; 27:950-956. [PMID: 29274905 DOI: 10.1016/j.jse.2017.10.024] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/16/2017] [Revised: 10/12/2017] [Accepted: 10/18/2017] [Indexed: 02/01/2023]
Abstract
Quadrilateral space (QS) syndrome (QSS) is a relatively rare condition in which the axillary nerve and the posterior humeral circumflex artery are compressed within the QS. Fibrous bands are most commonly implicated as the cause, with true space-occupying lesions being less common. QSS is characterized by poorly localized shoulder pain and paresthesia over the lateral aspect of the shoulder and arm in a nondermatomal pattern. These symptoms are aggravated by shoulder abduction and external rotation. Point tenderness is typically present over the QS; however, diagnosis on physical examination can be difficult. Pain relief after lidocaine block of the axillary nerve within the QS is a useful finding in the evaluation of patients with suspected QSS. No definitive diagnostic imaging exists, making diagnosis difficult, although radiographs and magnetic resonance imaging are recommended to rule out other pathology. Nonoperative treatment, including nonsteroidal anti-inflammatory drugs, activity modification, and physical therapy, for at least 6 months is recommended before pursuing operative intervention. Small case series have shown that surgical decompression of the QS has good outcomes, with resolution of pain and return to sport.
Collapse
Affiliation(s)
- Lindsay S Flynn
- Department of Orthopaedics and Rehabilitation, University of Florida, Gainesville, FL, USA
| | - Thomas W Wright
- Department of Orthopaedics and Rehabilitation, University of Florida, Gainesville, FL, USA
| | - Joseph J King
- Department of Orthopaedics and Rehabilitation, University of Florida, Gainesville, FL, USA.
| |
Collapse
|
7
|
Brown SAN, Doolittle DA, Bohanon CJ, Jayaraj A, Naidu SG, Huettl EA, Renfree KJ, Oderich GS, Bjarnason H, Gloviczki P, Wysokinski WE, McPhail IR. Quadrilateral space syndrome: the Mayo Clinic experience with a new classification system and case series. Mayo Clin Proc 2015; 90:382-94. [PMID: 25649966 DOI: 10.1016/j.mayocp.2014.12.012] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/10/2014] [Revised: 11/19/2014] [Accepted: 12/15/2014] [Indexed: 11/25/2022]
Abstract
Quadrilateral space syndrome (QSS) arises from compression or mechanical injury to the axillary nerve or the posterior circumflex humeral artery (PCHA) as they pass through the quadrilateral space (QS). Quadrilateral space syndrome is an uncommon cause of paresthesia and an underdiagnosed cause of digital ischemia in overhead athletes. Quadrilateral space syndrome can present with neurogenic symptoms (pain and weakness) secondary to axillary nerve compression. In addition, repeated abduction and external rotation of the arm is felt to lead to injury of the PCHA within the QSS. This often results in PCHA thrombosis and aneurysm formation, with distal emboli. Because of relative infrequency, QSS is rarely diagnosed on evaluation of athletes with such symptoms. We report on 9 patients who presented at Mayo Clinic with QSS. Differential diagnosis, a new classification system, and the management of QSS are discussed, with a comprehensive literature review. The following search terms were used on PubMed: axillary nerve, posterior circumflex humeral artery, quadrilateral space, and quadrangular space. Articles were selected if they described patients with symptoms from axillary nerve entrapment or PCHA thrombosis, or if related screening or imaging methods were assessed. References available within the obtained articles were also pursued. There was no date or language restriction for article inclusion; 5 studies in languages besides English were reported in German, French, Spanish, Turkish, and Chinese.
Collapse
Affiliation(s)
| | | | | | - Arjun Jayaraj
- Division of Vascular Surgery, Mayo Clinic, Rochester, MN
| | - Sailendra G Naidu
- Division of Vascular and Interventional Radiology, Mayo Clinic, Scottsdale, AZ
| | - Eric A Huettl
- Division of Vascular and Interventional Radiology, Mayo Clinic, Scottsdale, AZ
| | - Kevin J Renfree
- Department of Orthopedic Surgery, Mayo Clinic, Scottsdale, AZ
| | | | - Haraldur Bjarnason
- Division of Vascular and Interventional Radiology, Mayo Clinic, Rochester, MN
| | | | | | - Ian R McPhail
- Division of Vascular Medicine, Mayo Clinic, Rochester, MN; Division of Vascular and Interventional Radiology, Mayo Clinic, Rochester, MN.
| |
Collapse
|
8
|
Sonoelastography for the evaluation of an axillary schwannoma in a case of quadrilateral space syndrome. Clin Imaging 2014; 38:360-3. [DOI: 10.1016/j.clinimag.2013.12.019] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2013] [Revised: 12/01/2013] [Accepted: 12/26/2013] [Indexed: 02/07/2023]
|
9
|
Millett PJ, Schoenahl JY, Allen MJ, Motta T, Gaskill TR. An association between the inferior humeral head osteophyte and teres minor fatty infiltration: evidence for axillary nerve entrapment in glenohumeral osteoarthritis. J Shoulder Elbow Surg 2013; 22:215-21. [PMID: 22939404 DOI: 10.1016/j.jse.2012.05.030] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/27/2012] [Revised: 05/11/2012] [Accepted: 05/15/2012] [Indexed: 02/01/2023]
Abstract
BACKGROUND Glenohumeral osteoarthritis often results in inferior humeral osteophytes. Anatomic studies suggest that the axillary neurovascular bundle is in close proximity to the glenohumeral capsule. We therefore hypothesize that an inferior humeral osteophyte of sufficient magnitude could encroach on the axillary nerve and result in measurable fatty infiltration of the teres minor muscle. MATERIALS AND METHODS Preoperative magnetic resonance imaging studies of 91 consecutive arthritic shoulders were retrospectively reviewed. Two cohorts were established based on the presence of a humeral osteophyte. The distances from the axillary neurovascular bundle to various osseous structures were measured using calibrated software. Objective quantitative measurements of the degree of fatty infiltration of the teres minor muscles were obtained with image analysis software. Results were compared between cohorts. RESULTS The distance between the inferior humerus and axillary neurovascular bundle was inversely correlated to the size of the inferior humeral osteophyte (ρ = -0.631, P < .001). Fatty infiltration of the teres minor was greater when an inferior osteophyte was present (11.9%) than when an osteophyte was not present (4.4%) (P = .004). A statistically significant correlation between the size of the humeral head spur and quantity of fat in the teres minor muscle belly (ρ = 0.297, P = .005) was identified. CONCLUSION These data are consistent with our hypothesis that the axillary nerve may be entrapped by the inferior humeral osteophyte often presenting with glenohumeral osteoarthritis. Entrapment may affect axillary nerve function and lead to changes in the teres minor muscle. Axillary neuropathy from an inferior humeral osteophyte may represent a contributing and treatable cause of pain in patients with glenohumeral osteoarthritis.
Collapse
|
10
|
Blum A, Lecocq S, Louis M, Wassel J, Moisei A, Teixeira P. The nerves around the shoulder. Eur J Radiol 2013; 82:2-16. [DOI: 10.1016/j.ejrad.2011.04.033] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2011] [Accepted: 03/29/2011] [Indexed: 11/27/2022]
|
11
|
Chafik D, Galatz LM, Keener JD, Kim HM, Yamaguchi K. Teres minor muscle and related anatomy. J Shoulder Elbow Surg 2013; 22:108-14. [PMID: 22521388 DOI: 10.1016/j.jse.2011.12.005] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/10/2011] [Revised: 12/07/2011] [Accepted: 12/19/2011] [Indexed: 02/01/2023]
Abstract
BACKGROUND The purpose of this study was to describe the complex anatomy surrounding the teres minor muscle. METHODS Thirty-one cadaveric human shoulders were dissected. Qualitative fascial and neurovascular anatomy were described. Location of motor nerves to teres minor were measured in reference to local anatomy. RESULTS Fascial anatomy of the posterior shoulder had 2 distinct and equally common variants, 1 of which demonstrated a stout, inflexible fascial compartment enveloping the teres minor muscle. The other had a continuous fascia enveloping both the infraspinatus and teres minor muscles. In both variants, the primary nerve to teres minor traveled around a fascial sling, becoming sub-fascial at an average of 44 mm (range, 25-68) medial to the teres minor's insertion. The nerve took its most angulated course as it entered the fascial sling. Smaller accessory innervation of teres minor began, on average, 30 mm (range, 15-48) medial to the muscle's lateral insertion. None of the accessory motor nerves coursed deep to the fascial sling nor to the distinct teres minor fascial compartment. CONCLUSION A stout fascial sling may be the potential site of greatest compression and tethering of the primary motor nerve to teres minor. Additional lateral accessory motor nerves to teres minor remained extra-fascial and took a less angulated path. Half of the shoulders demonstrated a separate teres minor fascial compartment. An improved understanding of the fascial anatomy and innervation pattern of the teres minor muscle may help clinicians who treat patients with symptomatic isolated teres minor muscle atrophy.
Collapse
Affiliation(s)
- Dara Chafik
- Southwest Shoulder, Elbow and Hand Center, Tucson, AZ, USA
| | | | | | | | | |
Collapse
|
12
|
Arthroscopic trans-capsular axillary nerve decompression: indication and surgical technique. Arthroscopy 2011; 27:1444-8. [PMID: 21831569 DOI: 10.1016/j.arthro.2011.05.003] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/19/2011] [Revised: 04/25/2011] [Accepted: 05/05/2011] [Indexed: 02/02/2023]
Abstract
Symptomatic axillary nerve compression is rare yet results in debilitating pain, weakness, and decreased athletic performance in some patients. If nonoperative modalities fail, surgical intervention is necessary to reduce symptoms and avoid functional decline. Traditionally, open techniques have been described to decompress the axillary nerve and are reported to provide satisfactory results. Similar to suprascapular nerve decompression, recent advances have provided the opportunity to develop all-arthroscopic axillary nerve decompression techniques. Although direct comparisons between open and arthroscopic techniques do not exist, arthroscopic axillary nerve decompression may provide some benefits over open techniques. Therefore we present a technique and early results for all-arthroscopic trans-capsular axillary nerve decompression.
Collapse
|
13
|
de Lecluse J. Syndromes canalaires des nerfs axillaire, musculo-cutané et radial au coude. ACTA ACUST UNITED AC 2010. [DOI: 10.1016/j.jts.2010.07.004] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
14
|
Abstract
BACKGROUND Quadrilateral space syndrome is an uncommon condition that can disable the overhead athlete. The authors describe 4 cases of quadrilateral space syndrome that may assist clinicians in recognition of this problem in patients with posterior shoulder pain. HYPOTHESIS Quadrilateral space syndrome can present as posterior shoulder pain in the overhead athlete, and surgical decompression can relieve symptoms and allow full return to activity. STUDY DESIGN Case series; Level of evidence, 4. METHODS Between 2004 and 2006, the authors performed surgical decompression of the quadrilateral space in 4 overhead athletes (4 shoulders; mean age, 24 years). They evaluated the clinical presentations, diagnostic tests, surgical procedures, and results of treatment. Mean follow-up was 24.5 months. RESULTS All 4 patients underwent surgical decompression of the quadrilateral space. Fibrous bands entrapped the axillary nerve in 3 shoulders, and venous dilation was found in the fourth shoulder. All patients returned to full activity without pain or limitation of overhead function 12 weeks after surgery. CONCLUSION Quadrilateral space syndrome is an uncommon cause of posterior shoulder pain that is easily overlooked and can severely limit overhead function in the athlete. Surgical decompression can predictably relieve pain and improve function in patients who do not respond to nonoperative regimens.
Collapse
Affiliation(s)
- Timothy R McAdams
- Department of Orthopaedic Surgery, Stanford University, 1000 Welch Road, Suite 100, Palo Alto, CA 94304, USA.
| | | |
Collapse
|
15
|
McClelland D, Paxinos A. The anatomy of the quadrilateral space with reference to quadrilateral space syndrome. J Shoulder Elbow Surg 2007; 17:162-4. [PMID: 17993281 DOI: 10.1016/j.jse.2007.05.013] [Citation(s) in RCA: 69] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/15/2006] [Accepted: 05/07/2007] [Indexed: 02/01/2023]
Abstract
Quadrilateral space syndrome is a rare condition in which the contents of the quadrilateral space, the axillary nerve and the posterior circumflex humeral artery, are compressed, leading to vague symptoms of shoulder pain, tenderness over the quadrilateral space on palpation, and teres minor and deltoid denervation. Fibrous bands within the quadrilateral space are often cited in the literature as a cause of compression in quadrilateral space syndrome; however, Cahill and Palmer did not see these bands in cadaveric dissection. These are postulated to cause compression of the quadrilateral space contents in abduction and external rotation of the shoulder. To clarify the anatomic features that may predispose the development of quadrilateral space syndrome, 16 cadaveric shoulders were studied. Dissection revealed that fibrous bands are a common finding in the quadrilateral space, being present in 14 of 16 shoulders. The most common site for a fibrous band was between the teres major and the long head of the triceps. Where the bands were present, both internal and external rotation of the shoulder caused a reduction in the cross-sectional area of the quadrilateral space.
Collapse
Affiliation(s)
- Damian McClelland
- University Hospital of North Staffordshire, Staffordshire, United Kingdom
| | | |
Collapse
|