Narcolepsy and hypersomnia are distinct sleep disorders. Narcolepsy is a specific condition causing excessive daytime sleepiness, cataplexy (sudden muscle weakness), and often disrupted sleep cycles. Hypersomnia generally refers to excessive sleepiness but doesn't include narcolepsy's specific symptoms like cataplexy (32). Essentially, while both cause sleepiness, narcolepsy has unique symptoms that hypersomnia doesn't.