Diaphragm — Openings and Innervation

A 58-year-old man from Delhi presents to the emergency department with acute onset dyspnea and chest pain. He has a history of severe COPD and was straining during a coughing fit 2 hours ago. On examination, he is tachypneic (RR 28/min) and hypoxic (SpO₂ 82% on room air). Chest X-ray shows a left-sided diaphragmatic hernia with bowel loops visible in the thoracic cavity. The hernia is compressing the left lung base. Which of the following structures most likely herniated through the defect, given the acute traumatic mechanism?

At which vertebral level does the inferior vena cava pass through the diaphragm?

During a teaching round, a medical student is asked to identify the nerve that innervates the majority of the diaphragm. Which of the following nerves provides the most extensive motor innervation to the diaphragm?

A 52-year-old man undergoes cardiac surgery for coronary artery bypass grafting. Postoperatively, he develops a left-sided elevated hemidiaphragm on chest X-ray with reduced movement on fluoroscopy. Regarding the innervation of the diaphragm, all of the following are true EXCEPT:

A 52-year-old man with a history of left-sided rib fractures presents with reduced left hemidiaphragmatic movement on fluoroscopy. Which nerve injury would best explain this finding, and how does it differ from right phrenic nerve injury?