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).
Horse Anatomy: Withers. The withers are located above and just behind the horseâs shoulders where you would find the shoulder blades. They are the long thoracic vertebrae (roughly the 3rd through 11th) that support his head and neck. They are an important attachment point for the muscles of the torso.