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 Spondylotic Myelopathy (Spinal Cord Compression) Cervical spondylotic myelopathy (CSM) is a neck condition that arises when the spinal cord becomes compressedâor squeezedâdue to the wear-and-tear changes that occur in the spine as we age. The condition commonly occurs in patients over the age of 50.