![]() More common conditions that cause excessive daytime sleepiness include: In more severe cases, medications that stimulate the nervous system are used, such as amphetamine, methylphenidate or modafinil. If the symptoms are mild, simple management and coping techniques, such as making time for naps during the day, are helpful. Treatment depends on the severity of the condition. This deficiency is usually present in patients who have narcolepsy-cataplexy. Some people with narcolepsy have a deficiency of a wake-promoting chemical called orexin or hypocretin. Instead of introducing sleepy feelings towards the end of each day, narcolepsy prompts random sleepiness. It is thought that narcolepsy is caused by a malfunctioning of the hypothalamus that prevents pathways in the brain from working properly. The hypothalamus is also connected to the reticular activating pathways, which are the brain structures that govern our sleep and wake cycles. Some of its vital roles include controlling body temperature, appetite and thirst. The hypothalamus is a small structure that sits deep inside the brain. This immobilisation can last for a few seconds.
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