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).
Anatomy of the spine. The spinal column is made up of 33 vertebrae that are separated by spongy disks and classified into distinct areas: The cervical area consists of 7 vertebrae in the neck. The thoracic area consists of 12 vertebrae in the chest. The lumbar area consists of 5 vertebrae in the lower back.