Quantitative Electromyographic Analysis of Adaptive Muscular Compensation Mechanisms in Patients with Massive Irreparable Rotator Cuff Tears Exhibiting Preserved Shoulder Function

Status

Recruiting

Phases

Phase 1

Study type

Interventional

Source

TCTR

Registry ID

TCTR20260318003

Enrollment

Registered

2026-03-18

Start date

2026-03-16

Completion date

Unknown

Last updated

2026-08-03

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Patients diagnosed with unilateral massive irreparable rotator cuff tears of the shoulder, exhibiting a complete passive range of motion at the affected joint, diagnosed in Siriraj Hospital. massive irreparable rotator cuff tears of the shoulder complete passive range of motion

Interventions

Participants will undergo motion analysis assessment consist of 3 steps

1. Markers and surface EMG attachment 2. Maximum voluntary isometric contraction (MVIC) test 3. Dynamic movement tasks. Surface EMG (sEMG) will be recorded from the deltoids (anterior, middle, poster

Experimental No treatment

Surface EMG of both upper extremities

Eligibility

Sex/Gender

All

Age

18 Years to 85 Years

Inclusion criteria

Inclusion criteria: 1. Patients diagnosed with unilateral massive irreparable rotator cuff tears of the shoulder, exhibiting a complete passive range of motion at the affected joint. 2. Age between 18 - 85 years old.

Exclusion criteria

Exclusion criteria: 1. Patients with bilateral rotator cuff tears of the shoulder. 2. Patients with VAS pain score > 4 or those who have shoulder discomfort during shoulder motion during the research protocol. 3. Patients with previous fractures of proximal humerus, clavicle or scapular region of the extremity involved in the study. 4. Patients with neurological injury that interferes with movement of the shoulder girdle of the extremity involved in the study. 5. Patients with concomitant shoulder pathologies such as adhesive capsulitis, glenohumeral instability or osteoarthritis of the shoulder of the extremity involved in the study. 6. Patients unwilling to participate in the study.

Design outcomes

Primary

Measure	Time frame
maximum voluntary contraction immediate at intervention surface EMG during movement tasks	—

Secondary

Measure	Time frame
mean muscle activation immediate at intervention surface EMG during movement tasks	—

Countries

Thailand

Contacts

Public ContactPichitpol Kerdsomneuk

Faculty of Medicine, Siriraj Hospital, Mahidol University

pichitpol.ker@mahidol.ac.th024197968

Outcome results

None listed

Source: TCTR (via WHO ICTRP) · Data processed: Aug 10, 2026