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).
Sacral Spine. Sections. The sacral spine refers to the five fused vertebrae (S1-S5) at the end of the spinal column. Basically, the sacral spine is located behind the pelvis, between the hip bones and connects the spinal column to the pelvis. This general area is sometimes referred to as the lumbosacral spine.