Possibly related, assuming we're talking about the same thing, the KCNQ2 SNP is associated with infantile epileptic seizures. Some of these respond to sodium channel blockers. I'd also wonder about keto diets, as they're known to alleviate epileptic seizures. Gotta wonder if any of this might be helpful to insomniacs with sleep continuity issues unrelated to apnea.

95% chance I'm completely off base here, just thinking aloud...