Now, on the posterior side, you find, as well, another line, letâs say, but this time called the intertrochanteric crest that is also between the neck of the femur and the shaft and runs, as well, from the greater trochanter all the way down to the lesser trochanter.
The upper back has the most structural support, with the ribs attached firmly to each level of the thoracic spine and very limited movement. The lower back (lumbar vertebrae) allows for flexibility and movement in back bending (extension) and forward bending (flexion).
Fig. 1: Sagittal view of the cervical spine. (larger view). The cervical spine is comprised of seven vertebrae-C1, C2, C3, C4, C5, C6, C7 (often noted as C1-C7) - that begin at the base of the skull and extend down to the thoracic spine.he first cervical vertebra is unique in that it is a ring that rotates around the second vertebral body (the odontoid). The cervical vertebrae closest to the skull are the smallest. All of the cervical vertebrae are smaller than the vertebrae in the thoracic spine (upper back) and the lumbar spine (lower back).