India, Nov. 14 -- Sleep is vital for brain health, as well as our overall health. It serves as a state of active restoration, memory organisation, and cellular cleanup. According to Dr Arun Shah, director of neurosciences at the Sir HN Reliance Foundation Hospital with over 40 years of experience, the key functions of the brain include waste clearance through the glymphatic system, memory consolidation through neural connections, and cognitive and emotional regulation.

This is why adequate sleep (at least 7 to 9 hours for most adults) sharpens attention, decision-making, problem-solving, reaction time, and emotional stability.

However, in an interaction with HT Lifestyle, Dr Arun noted that it is not just adequate sleep which is importa...