Manual Therapy on Head-repositioning Accuracy and Static Postural Balance in Neck Pain Patients

Inclusion Criteria: * Aged 18 to 65 years * Presented with a complaint of neck pain (defined as pain in the region from the upper thoracic spine to the occiput and the surrounding musculature) for more than 7 weeks. * Had not received neck pain treatment in the past 1 month Exclusion Criteria: * Onset of presenting neck pain episode after trauma (eg, whiplash) * History of cervical injury of trauma since the onset of presenting neck pain episode * History of cervical injury or trauma * Neck pain due to fracture, tumor, infection, severe spondyloarthropathy, or other non-mechanical cause such as inflammatory arthritis; * Progressive neurological deficit, myelopathy, herniated nucleus pulpous, or severe incapacitating pain; * Being treated by electrical devices; * Blood coagulation disorder or were using corticosteroids or anticoagulant medications; * History of stroke or transient ischemic attacks; * Vertebrobasilar artery insufficiency; * Neurologic disease (eg, multiple sclerosis, Parkinson's disease, syringomyelia); * Congenital anomalies involving the C-spine; * Systemic disease (eg, diabetes mellitus); * Pain involving third-party liability or Workers' Compensation.