Muscle Activity Before and After Subacromial Injection.

Context: Shoulder muscle activation in patients with subacromial impingement is highly cited and variable in the literature. Differences between studies could be due to artifacts introduced by normalization practices in the presence of pain. Ultimately, this lack of knowledge pertaining to pathogene...

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Publicado en:Journal of Sport Rehabilitation Vol. 30; no. 8; pp. 1144 - 1151
Autores principales: Ettinger, Lucas, Shaprio, Matthew, Karduna, Andrew
Formato: research tables/charts Journal Article
Publicado: Human Kinetics Publishers, Inc. Nov2021
Acceso en línea:Ver este registro en EBSCOhost
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        10566716
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      jtl: Journal of Sport Rehabilitation
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      dt: Nov2021
      vid: 30
      iid: 8
      pid: 553
      pub: Human Kinetics Publishers, Inc.
      place: Champaign, Illinois
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        10.1123/jsr.2020-0524
        153310782
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        atl: Muscle Activity Before and After Subacromial Injection.
      aug:
        au:
          Ettinger, Lucas
          Shaprio, Matthew
          Karduna, Andrew
      sug:
        subj:
          Shoulder Impingement Syndrome Drug Therapy
          Anesthetics, Local Administration and Dosage
          Muscle, Skeletal Physiology
          Electromyography
          Injections, Intraarticular
          Task Performance and Analysis
          Treatment Outcomes Evaluation
          Human
          Comparative Studies
          Deltoid Muscles Physiology
          Trapezius Muscles Physiology
          Latissimus Dorsi Muscles Physiology
          Serratus Anterior Muscles Physiology
          Shoulder Pain
          Power Analysis
          Clinical Trials
          Male
          Female
          Pretest-Posttest Control Group Design
          Middle Age
          Descriptive Statistics
          Biomechanics
          Visual Analog Scaling
          Analysis of Variance
          Confidence Intervals
          Post Hoc Analysis
          Middle Aged: 45-64 years
          Male
          Female
      ab: Context: Shoulder muscle activation in patients with subacromial impingement is highly cited and variable in the literature. Differences between studies could be due to artifacts introduced by normalization practices in the presence of pain. Ultimately, this lack of knowledge pertaining to pathogenesis limits the clinical treatment and restoration of muscular function. Design: A total of 21 patients with stage 2 subacromial impingement and 21 matched controls were recruited for EMG testing of their affected shoulder during an arm elevation task. The patients were tested before and after receiving an injection to their subacromial bursa. Methods: The EMG from 7 shoulder muscles were measured before and after treatment during humeral motion in the scapular plane. Results: Our findings indicate an increase in anterior deltoid, middle deltoid, and upper trapezius activity following the injection; further, this trend extended to the controls. The control subjects had a greater activation of the latissimus dorsi at peak arm elevation when compared with the patient group postinjection. Conclusions: Our results indicate that a reduction in subacromial pain is associated with changes in shoulder muscle recruitment, primarily of the deltoid. This change in deltoid activity may lend evidence to rotator cuff function in patients without rotator cuff tears.
      pubtype: Academic Journal
      doctype:
        research
        tables/charts
        Journal Article
      ougenre: Article
    language: English
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