الفهرس 
Relationship between chronic neck pain and diaphragmatic dysfunction
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Abstract
Background: chronic neck pain (CNP) occurs due to poor posture of cervical spine that may develop from long term use of smart phones and personal computers. Recently, an association between CNP and deterioration in pulmonary functions has been reported, especially when CNP coexisted with forward head posture. There have been recent suggestions to add respiratory assessment to the routine physiotherapy assessment for chronic neck pain patients. Purpose: The main purpose of this study was to assess for a correlation that could exist between CNP and either diaphragmatic excursion or diaphragmatic thickness fraction (DTF) in patients with chronic neck pain. Methods: Fifty subjects with chronic neck pain were recruited to this study (11 males and 39 females). The mean value of age of the subjects was 41.14±8.11 years, and the mean value of BMI was 25.57±2.85 Kg/m2. The inclusion criteria were middle-aged patients, both males and females, patients with nonspecific chronic neck pain, and patients with craniovertebral angle of less than 50 degrees. The exclusion criteria were patients with neck pain due to disc prolapse or trauma, patients with cardiopulmonary problems, or smokers. The outcome measures in this study were diaphragmatic excursion and DTF measured by ultrasonography, Visual Analogue Scale (VAS) for pain, and Neck Disability Index (NDI)