For youth, is it worth sacrificing sleep for study?

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The lack of it – either in terms of quality or quantity – can lead to excessive daytime sleepiness, poor reflexes, poor concentration, mood changes, irritability, depression and other health issues such as high blood pressure, strokes and heart attacks.

With consecutive or many nights of little sleep, the brain’s mental ability, sharpness and capacity also slows down. Memory is also affected and any recall function decreases due to cognitive impairment. 

Dream sleep is important in rejuvenation, repair and memory rebuilding of the brain – so the more one dreams, the more refreshed one will be. 

with the advent of social media and gaming, the excess amount of blue-light – the light from screens of digital devices – ... affects their sleep quality and also stimulates neurons in the brain and might be associated with sleeplessness.