To identify the effectiveness of traction in patients with discogenic cervical radiculopathy. Specific questions to be explored include: 1. What is the effect of manual traction on neck range of motion? 2.What is the effect of mechanical traction on neck range of motion? 3. What is the effect of continuous traction on neck range of motion? 4. What is the effect of intermittent traction on neck range of motion? 5. Which type (manual or mechanical) of traction is more effective in improving range of motion? 6. Which mode (intermittent or continuous) of traction is more effective in improving range of motion? 7. What parameter of traction is most effective in treating patients with cervical radiculopathy?
Studies that include participants of both the genders over the age of 18 years with cervical radiculopathy caused by cervical disc pathology will be included. Studies which include patients with acute, sub-acute, or chronic discogenic cervical radiculopathy will be considered.
Studies that evaluate cervical traction, manual or mechanical, either in intermittent or continuous mode, alone or as a combination therapy with other physical therapy intervention.
Studies with cervical joint range of motion (measured with inclinometer or goniometer, cervical range of motion device) as the outcome measure.