Transcontinental railroads in and near the United States (1887). A transcontinental railroad is a contiguous network of railroad trackage that crosses a continental land mass with terminals at different oceans or continental borders.
Normal cervical range of motion is. 1  Flexion â 80 to 90 degrees. 2  Extension â 70 degrees. 3  Lateral flexion â 20 to 45 degrees on both sides.  Rotation â 90Â° of rotation to both sides.
Age is the most common risk factor for cervical spondylosis. The condition is extremely common in patients who are middle-aged and older. Other factors that may increase your risk for developing cervical spondylosis and neck pain include: Geneticsâa family history of neck pain and spondylosis.