Central Sleep Apnea Positional?

There are multiple ways of thinking about it. The closest, the most likely in my view, is that when we are supine, our lung volumes are smaller and this is especially in obese individuals. A smaller room is more likely to respond to a change in the furnace activity. And this may also explain why giving CPAP in about 50% of central apnea patients will treat the condition because you're increasing lung volume. One of them that has not been shown in humans, but it's at least in animals, if you deform the upper airway, you'll induce central apnea in animals.