Final answer:
The abnormal respiratory pattern associated with structural or compressive lesions in the medullary respiratory center is Ataxic respiratory pattern. It is characterized by an irregular, cluster-type respiratory pattern.
Step-by-step explanation:
The abnormal respiratory pattern associated with structural or compressive lesions in the medullary respiratory center is Ataxic respiratory pattern. This pattern is characterized by an irregular, cluster-type respiratory pattern where the breaths are unpredictable in terms of depth and rhythm. It is often caused by damage to the medulla oblongata, which can occur due to strokes, tumors, or other structural lesions.