A good sleep is needed for good life. And this is true for the brain as well. Sleep has a lot of things to do with brain especially memory.
Sleep has two phases: NREM (Non rapid eye movement) phase and REM (Rapid eye movement or deep sleep). Its during REP phase short term memory(memory lasting second to hours) is consolidated and converted into long term memory( Last for a very long time with unlimited capacity). For the formation of long term memory, there should be change in the structure of neurons as well as dissipation of information from hippocampus to other parts of brain mainly cerebral cortex.
It has been proved scientifically that sleep is important for memory as it’s the period during which our memory is consolidated.Generally, an average of 8 hours of sleep is good for the brain. Taking nap in between your studies helps in memorizing the contents. For example, taking nap every half an hour or 15 minutes after a study period of 2 or 3 hours helps you memorize better than studying continuously for an entire day.
So, managing your sleep along with your study might make you smart.