Sleep plays an important role in memory consolidation and learning and is important for organizing memories and transferring newly-learned knowledge form short term to long term ‘storage’ in the brain. A recent study at the Massachusetts institute of Technology revealed that the brain has another function: to replay the events of the day. The above revelation was made after researchers found that the Neurons of the hippocampus (The memory centre) and the visual cortex in rat’s brains, which were active during a waking experience, were reactivated during sleep. These results may help us understand the role of sleep and dreaming in the learning and memory process of humans and animals.

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