Electromyographic Activity of Posterior Oblique Sling Muscles in Patients with Shoulder Impingement Syndrome (EMG)

this study aims to assess the gluteus maximus muscle electromyographic activity and the latissimus dorsi muscle electromyographic activity in patients with shoulder impingement syndrome , to improve the assessment procedure and the rehabilitation program for treating patients with shoulder impingement syndrome more effectively. .

Study Overview

• Status: Not yet recruiting
• Conditions: Shoulder Impingement Syndrome
• Intervention / Treatment: Device: electromyography

Detailed Description

background: Shoulder pain is the third most common musculoskeletal complaint that can lead to disability that interfere with work, hobbies, social, and sporting activities and may also be associated with psychological distress and reduced quality of life .Shoulder impingement syndrome Symptoms is the most common cause of shoulder pain.

Normal shoulder movement is achieved through a stable lumbopelvic-hip complex and scapula. Thus, the pelvis must provide a stable platform for the scapula and the scapula provide a stable platform for the shoulder. The existing evidence supports myofascial biomechanical connection between lumbopelvic region and contralateral glenohumeral joint .So Considering the LP region and related myofascial force transmission as contributing factors for shoulder pathogenesis can explain the reasoning on why some of the patients with shoulder pain may progress to develop chronic shoulder pain.

purpose: this study aims to assess the gluteus maximus muscle electromyographic activity and the latissimus dorsi muscle electromyographic activity in patients with shoulder impingement syndrome , to improve the assessment procedure and the rehabilitation program for treating patients with shoulder impingement syndrome more effectively.

methods: This study is a cross sectional comparative study will be conducted at the out-patient physical therapy clinic, Pharos University in Alexandria, Egypt. 30 patients with unilateral shoulder impingement and 30 healthy controls without shoulder impingement , with age range between 25 and 40 years will be included in the study. All patients will be referred by an orthopedic surgeon.

results: data analysis with one-way ANOVA will be used to compare between subjects characteristics of the two groups and un-paired t-test will be used to compare measured variables between groups.

keywords: shoulder impingement syndrome, posterior oblique sling , electromyography , latissimus dorsi , gluteus maximus

• Study Type: Observational
• Enrollment (Estimated): 60

Contacts and Locations

• Study Contact: Name: nada M emara, BSc; Phone Number: 00201005281592; Email: nada.emara@pua.edu.eg

Study Locations

• Egypt
  • Giza
    • Cairo, Giza, Egypt, 12613
      • Cairo university
      • Contact: Sohier S Rizk, PhD; Phone Number: 0020124003374; Email: sohair.shehata@pt.cu.edu.eg
      • Contact: Aya A Khalil, PhD; Phone Number: 00201112204944; Email: aya.abdelhamid@pt.cu.edu.eg
      • Contact: nada M emara, BSc

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: Adult
• Accepts Healthy Volunteers: Yes

• Sampling Method: Non-Probability Sample

Study Population

All patients will be referred by an orthopedic surgeon who will diagnose SIS based on clinical and radiological examination.

Description

Inclusion Criteria:

1. Both male and female patients with shoulder impingement syndrome.
2. patients complain from unilateral shoulder pain with chronic conditions of SIS ≥ 3 months.
3. Patient age from 25 to 40 years.
4. Patients with Positive impingement tests.
5. Patients with painful arc of movement (60°- 120°)

Exclusion Criteria:

1. Patients with Numbness or tingling of upper extremity.
2. Patients with Shoulder fracture or previous shoulder surgery, and Acromioclavicular or shoulder dislocation.
3. Patients with Any traumatic injury to the lower limb in the previous 6 months.
4. Any spine surgery within the last 2 years.
5. Patients with history of lower back pain in past 12 months .
6. Patients with history of lower extremity dysfunctions in the past 12 months .
7. Participants who had taken any drugs (e.g. statins and spasmed), which have effects on the skeletal muscles.
8. Open wounds, rashes, psoriasis, skin irritations, or skin conditions of any kind in the region of electrode placement
9. Participants with a Body Mass Index (BMI) ≥ 30

Study Plan

How is the study designed?

Number of groups / cohorts

2

Cohorts and Interventions

Group / Cohort	Intervention / Treatment
Group A (control group); controls	Device: electromyography; electromyographic activity of posterior oblique sling muscles will be measured
Group B (experimental group); cases	Device: electromyography; electromyographic activity of posterior oblique sling muscles will be measured

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
• electromyographic activity of posterior oblique sling muscles (gluteus maximus and latissimus dorsi)	EMG has been widely used for many decades, its use is proven and widely accepted by clinicians and the scientific community and it is considered the gold standard method for the measurement of muscle activity.	through study completion, an average of 4 months

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
shoulder active range of motion	Universal goniometry is frequently used by physical therapists to assess ROM due to its ease of use, portability, noninvasive nature, and low cost.	through study completion, an average of 4 months
shoulder function and disability level	The Arabic Q-DASH questionnaire has demonstrated good reliability, validity, and responsiveness when used for patients with upper extremity disorders.	through study completion, an average of 4 months
shoulder pain	The ordinal 11-point NPRS (0-no pain, 10-most intense pain) has good test-retest reliability (r=.79-.96) in individuals with chronic pain and musculoskeletal pathology.	through study completion, an average of 4 months

Collaborators and Investigators

• Sponsor: Cairo University
• Investigators: Study Chair: Soheir S Rizk, PhD, Cairo university; Study Director: Aya A Khalil, PhD, Cairo university

Study record dates

Study Major Dates

• Study Start (Estimated): January 1, 2025
• Primary Completion (Estimated): April 1, 2025
• Study Completion (Estimated): April 1, 2025

Study Registration Dates

• First Submitted: January 16, 2025
• First Submitted That Met QC Criteria: January 22, 2025
• First Posted (Actual): March 25, 2025

Study Record Updates

• Last Update Posted (Actual): March 25, 2025
• Last Update Submitted That Met QC Criteria: January 22, 2025
• Last Verified: January 1, 2025

More Information

Terms related to this study

• Additional Relevant MeSH Terms: Shoulder Injuries; Musculoskeletal Diseases; Wounds and Injuries; Pathologic Processes; Joint Diseases; Disease; Rupture; Tendon Injuries; Rotator Cuff Injuries; Syndrome; Shoulder Impingement Syndrome
• Other Study ID Numbers: P.T.REC/012/005452 (Other Identifier: ethical committee faculty of physical therapy CU)

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: NO

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No
• product manufactured in and exported from the U.S.: No