Title: वैकल्पिक

Text: It is now known that the hypothalamus secretes "wakefulness" hormones, orexins, and that these are deficient in people who have congenital narcolepsy. Damage to the hypothalamus, from a head injury or a tumor or disease, can also cause narcolepsy later in life. प्रत्येक पराग्राफले परीक्षण हुनेछ।

Save test: यदि तपाईं यो टाइपिङ परीक्षणलाई साझा गर्न चाहानुहुन्छ भने यो प्रयोग गर्नुहोस् (केवल प्रमाणीकृत प्रयोगकर्ताहरूको लागि)।