Effects of Neck Proprioception Impairment on Balance in Cervical Spondylosis Patients

Inclusion Criteria: * Eighty-two patients with cervical spondylosis, the patient will be diagnosed and referred by physician. * Mild to moderate cervical disability according to neck disability index( MacDermid et al., 2009). * Age ranges from 25 to 45 years. * Body mass index from 18.5 - 24.9. Exclusion Criteria: * The patients will be excluded if they have one of the following: * visual or vestibular sensory disorders or cerebellar disease. * Cervical myelopathy. * Patients with previous cervical surgery. * inflammatory diseases involving cervical spine such as rheumatoid arthritis or ankylosing spondylitis. * History of cervical trauma including whiplash associated disorders (WAD). * History of cervical tumors. * History of ankle instability. * No previous foot and ankle surgery.