Damage to lower pons, leaving upper pons intact, will result in:
Damage to lower pons will damage the apneustic center. This center was causing the breathing to be slow and deep. Upper pons has pneumotaxic center. It causes the breathing to be rapid and shallow. Since this center is intact (and apneustic is damaged), breathing will become shallow and rapid.
Apneusis
Rapid, shallow breathing
Irregular gasping type of breathing
No change in pattern of breathing
Respiratory System Pa 3