Alterations in Central Control of Shoulder Muscles in Office Workers With Non-specific Chronic Neck Pain

Inclusion Criteria

• •1. Ages ranges from 20-40 years old
• •2. Work with the computer at least 25 hours per week
• •3. Neck pain of idiopathic origin ≥ 6 months during the past year
• •4. Minimum of 3/10 on the numerical rating scale (NRS) in past 7 days
• •5. No structural abnormalities which are confirmed by neck X-ray or negative results of all the following special tests
• •* Exclude nerve root compression: Cervical distraction test and Spurling's test
• •* Exclude cervical radiculopathy: Valsalva test
• •* Exclude cervical instability: Alar ligament test and Sharp-Purser test
• •6. Specific head movements or maintaining the fixed posture for a long time reproduced neck pain
• •1. Ages ranges from 20-40 years old
• •2. Work with the computer at least 25 hours per week
• •3. No history of neck and/or shoulder pain sustained over one week in the past one year
• •1. Ages ranges from 20-40 years old
• •2. No history of neck and/or shoulder pain sustained over one week in the past one year