(2000) , there is specialization in the lumbo-
sacral vertebrae and spinal cord in birds, which can be assumed for animals moving on ground.
Chest radiographs, abdominal and lumbo-
sacral spines radiographs were chosen because of the proximity of these body parts to radio- sensitive organs in the body.
[9, 4, 2] The interrelationship between proximal (lower back) and distal body segments (knee) has been confirmed by Crewe et al.,  who found an association between a more extended front knee during the front foot contact phase and lumbo-
pelvic shear forces.