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).
The vertebrae that make up the spinal column have a specific shape that is made to protect the spinal cord from injury. The T4 vertebra is located about midway up the spine. The portion of the spinal cord that the thoracic vertebrae protect is referred to as the thoracic cord. This part of the cord sends and receives signals from the area of the abdomen just above the waist.