India, Sept. 29 -- In today's episode of Everyday Explained, we're looking at one of those strangely familiar moments: walking into a room and suddenly forgetting why you went there. You may head to the kitchen to get something, reach the doorway and then stop to think, "Why am I here?" A few seconds later, the thought may return, sometimes only after you walk back to where you came from. But why does this happen? Is the doorway actually responsible, or is something else happening in the brain? Let's find out. (Also read: Everyday explained: Why do some songs get stuck in your head? Know the surprising science behind it )

Researchers have studied this phenomenon under the name doorway effect, also known as the location updating effect. T...