Fig. 1From: Why most patients do not exhibit obstructive sleep apnea after mandibular setback surgery?Relationship between obesity and OSA. The mandibular skeleton or vertebrae can serve as a rigid framework. Increased fat accumulation at the pharyngeal airway can increase tissue pressure surrounding the pharyngeal airway. The lung volume may be decreased by excessive visceral fat deposition in the chest cavity between the vertebrae and ribsBack to article page