Thelansis

 Idiopathic hypersomnia (IH) is a chronic neurological condition characterized by excessive daytime sleepiness, sometimes accompanied by extended sleep periods. Accurate estimates of IH prevalence are challenging due to the need for specialized testing and the need to rule out other disorders with similar symptoms. Clinical figures regarding IH's occurrence can vary significantly, with some studies indicating a 1:10 ratio compared to narcolepsy with cataplexy. It's noteworthy that a family history of excessive sleepiness or other hypersomnolence-related central disorders is evident in about 34-38% of IH patients, and 12.5% have at least one parent who consistently sleeps more than 9.5 hours per night. Distinguishing features of IH and narcolepsy type 1 (NT1) are quite clear: IH patients lack cataplexy, have efficient nighttime sleep with few awakenings, and experience long but unrefreshing naps. In contrast, NT1 patients have cataplexy, fragmented nocturnal sleep, and find shor...

 Idiopathic hypersomnia (IH) is a chronic neurologic disorder that manifests as pathologic daytime sleepiness with or without prolonged sleep durations. Population-based estimates of the frequency of IH are difficult to obtain, given the requirements for electrophysiologic testing and ruling out other disorders that may cause similar symptoms. Clinic-based estimates of IH prevalence are limited by differing referral patterns and biases, such that estimates of the relative frequency of IH to narcolepsy with cataplexy vary substantially, anywhere from 1:10 to greater than 1:1. Family history of excessive sleepiness, IH, or another central disorder of hypersomnolence is seen in 34–38% of IH patients, with parent-child transmission suggested by the finding that 12.5% of IH patients have at least one parent who routinely sleeps more than 9.5 hours per night. ·        Clinical features of IH and narcolepsy type 1 (NT1) are fairly distinct: patients with IH...