الفهرس 
Cervicalspine mechanical deficits inshoulder impingement syndrome patients : A case control study
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Abstract
Background: Shoulder impingement syndrome (SIS) is one of the most common musculoskeletal pain conditions. Cervical spine deficits may be a contributing factor as alignment of the cervical spine is important to the forces transmitted through the shoulder. objective: to investigate if cervical mechanical deficits correlate with shoulder pain and disability and differ between shoulder impingement syndrome patients and controls. methods: group A (SIS group); consisted of 20 patients, with mean age of 36 years, group B (control group); consisted of 20 normal controls, with mean age of 34 years.Each participant was assessed for pain and disability using shoulder pain and disability index (SPADI), active joint angular reproduction (AJAR) at 30o cervical flexion and extension using inclinometer, and craniovertebral angle (CVA) using photography. results: significant fair positive correlation between AJAR error at 30o cervical flexion and both shoulder pain (r=0.33, P=0.03) and disability (r=0.3, P=0.05) and a significant difference between groups in AJAR error at extension (t=2.8, P=0.000). conclusion: Cervical proprioception deficits have a significant correlation with shoulder pain and disability