ArticleRespiration; international review of thoracic diseases2023
Sternocleidomastoid Muscle Thickness Correlates with Exercise Tolerance in Patients with COPD.
Article in Respiration; international review of thoracic diseases, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT06736145 (Effects of Cervical Nags on Accessory Muscles in Patients With Copd), which is not on this map. Cited by 7 papers, 1 of them a synthesis that pooled it.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Effects of Cervical Nags on Accessory Muscles in Patients With Copd
Who cites it
7 citing papers in PubMed, 1 synthesis or guideline pooled it, 12 citations in OpenAlex.
- Respiratory Muscle Strength and Mortality in Patients with COPD: A Systematic Review and Meta-Analysis.International journal of chronic obstructive pulmonary disease · 2025Pooled it
- Intermittent neck flexion induces greater sternocleidomastoid deoxygenation than inspiratory threshold loading.European journal of applied physiology · 2024Trial
- Respiratory sarcopenia defined by paraspinal muscle mass and peak expiratory flow predicts postoperative pneumonia after esophagectomy for esophageal cancer: a comparison with sternocleidomastoid muscle mass.Esophagus : official journal of the Japan Esophageal Society · 2026Article
- Ultrasound shear wave elastography of the sternocleidomastoid muscle in patients with obstructive sleep apnea syndrome.Sleep & breathing = Schlaf & Atmung · 2025Article
- Differences in muscle atrophy between the lower limbs and the accessory respiratory muscles in critically ill patients.Journal of medical ultrasonics (2001) · 2025Article
- Measurement Reliability for the Anatomical Characteristics of Cervical Muscles Using Musculoskeletal Ultrasound in Healthy Individuals.Muscles (Basel, Switzerland) · 2025Article
- Inspiration Time: The Ultrasound Variable Necessary to Study the Diaphragm Functionality. A Cross-Sectional Controlled Study.SAGE open nursingArticle
Corrections and comments
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Authors and funding
11 authors at 2 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundPatients with chronic obstructive pulmonary disease (COPD) have difficulties inhaling as the diaphragm becomes flattened and weakened due to lung hyperinflation. This weakened respiratory function is compensated for by the increased activity of the accessory respiratory muscles, such as the sternocleidomastoid muscle (SCM).
objectivesThis study aimed to evaluate the difference in the SCM thickening fraction (SCM TF) of each respiratory phase (end-expiration, resting inspiration, and end-inspiration), as measured using ultrasonography (US), between patients with COPD and control subjects. We also evaluate the correlation between the SCM TF of each respiratory phase and exercise tolerance in patients with COPD.
methodsPatients with COPD (n = 44) and age-matched controls (n = 20) underwent US for determination of the SCM TF. Ventilation parameters, including the peak oxygen uptake (peak VO2) and the change in the inspiratory capacity, were measured during cardiopulmonary exercise testing. The SCM thickness and TF was measured during end-expiration, resting breathing, and end-inspiration.
resultsThe SCM was significantly thinner in patients with COPD than in controls at end-expiration. The increase in the SCM TF from end-expiration to end-inspiration in patients with COPD did not differ significantly from that in control subjects. In contrast, the SCM TF from end-expiration to resting inspiration was significantly greater in patients with COPD than in control subjects. The peak VO2 was strongly positively correlated with the SCM TF from end-expiration to end-inspiration in patients with COPD (r = 0.71, p < 0.01).
conclusionsThe SCM may be thinner in patients with COPD than in controls. The SCM TF may also be associated with exercise tolerance.
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Registered trials
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