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.
Cervical lordosis refers to the normal curve of the neck vertebrae. Physical therapy may be used to help restore range of motion in some people with cervical lordosis. Problems in the cervical spine may occur as a result of poor posture. For some patients, surgery may be necessary to address cervical lordosis.