Question: An adult man presents with excessive daytime sleepiness. His wife reports that he snores loudly every night. The patient's BMI is 32 kg/m2. He denies any history of smoking or alcohol consumption. Which of the following pathophysiologic mechanisms is the primary factor contributing to his likely diagnosis? Group of answer choices Decreased diaphragmatic excursion leading to reduced inspiratory volume Absence of neural input leading to cessation of respiratory effort Parasympathetic overac