Observational studyIrish journal of medical science2025
Alterations in proximal shoulder muscles in stroke-related pain: a myotonometric study.
Observational study in Irish journal of medical science, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT05920837 (The Relationship Between Upper Extremity Viscoelastic Properties and Functionality in Sub-acute Stroke Patients), which is not on this map. Not yet cited in PubMed.
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The Relationship Between Upper Extremity Viscoelastic Properties and Functionality in Sub-acute Stroke Patients
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4 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundPost-stroke shoulder pain is one of the most common complications.
aimWe aimed to investigate the shoulder pain-related myotonometric changes of the biceps brachii (BB) and triceps brachii (TB) muscles and emphasize the differences in viscoelastic parameters according to pain severity in subacute stroke patients.
methodsIn this cross-sectional study, 45 subacute stroke patients were allocated into the painless group (CG, n = 15), mild shoulder pain group (MiPG, n =16), and moderate shoulder pain group (MoPG, n = 14) using the Visual Analog Scale. The muscle tone, stiffness, and elasticity of BB and TB muscles were evaluated with the MyotonPro® (Myoton AS, Estonia).
resultsTone was similar on both sides in all groups (p > 0.05), except for the triceps in the painless group. The tone of TB muscle was higher on the affected side in the CG (p = 0.041). BB and TB tones were lower in the pain groups compared to CG (p < 0.05). BB stiffness was higher on the unaffected side in MiPG and CG (p = 0.016 and p = 0.041). BB stiffness was also higher in the CG compared to patients with shoulder pain on both sides (p = 0.001, p = 0.044). TB stiffness was similar across all groups (p > 0.05). TB elasticity was higher on the unaffected side in MiPG and CG (p = 0.023, p = 0.010), while BB and TB elasticity did not differ significantly between groups (p > 0.05).
conclusionsThe differences between affected and unaffected extremities in stroke patients may result from adaptations in the non-paretic limb or abnormal scapular rhythm. In contrast to common knowledge, in this study, tone and stiffness decreased as pain increased. Additionally, changes in muscle elasticity may not have occurred in stroke patients during subacute phase. CTN: NCT05920837.
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