Final answer:
If the sternum is demonstrated lateral to the midpoint between the vertebral column and anterior ribs, the patient was under-rotated.
Step-by-step explanation:
The position of the sternum in relation to the midpoint between the vertebral column and anterior ribs can indicate whether the patient is over-rotated, under-rotated, correctly positioned, or tilted. If the sternum is demonstrated lateral to the midpoint, it means the patient was under-rotated. This means that the sternum is not aligned properly with the rest of the thorax. Conversely, if the sternum is demonstrated medial to the midpoint, it would indicate that the patient was over-rotated.