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).
Cervical. The first seven vertebrae, all in the neck. These are smaller and lightly built. Thoracic. Twelve vertebrae, each articulating with the twelve pairs of ribs. Lumbar. The lower five vertebrae, between the ribs and the sacrum.These have the largest vertebral bodies. Each of the three segments of the spine has a curve. The cervical spine and the lumbar curve both are convex anteriorly, while the thoracic spine curves the opposite way, convex posteriorly.Each vertebra is shaped a bit like a wedge to support these curves, especially noticeable with the five lumbar vertebrae.he first seven vertebrae, all in the neck. These are smaller and lightly built. Thoracic. Twelve vertebrae, each articulating with the twelve pairs of ribs. Lumbar. The lower five vertebrae, between the ribs and the sacrum.