What are neurofibrillary tangles?

Neurofibrillary tangles are like twisted ropes inside brain cells that cause trouble when they get too knotted up.

Imagine your brain is full of tiny workers called neurons, they send messages to each other all day long. Inside these neurons, there are little strings made of special proteins called tau. Normally, these strings help keep the cell organized and working smoothly.

But sometimes, those tau strings start to twist and tangle together, like yarn that’s been knotted up too many times. When this happens, it creates a neurofibrillary tangle, which is like a traffic jam inside the brain cell. The tangled mess makes it harder for the messages to travel through the cell, slowing things down or even stopping them completely.

Think of a toy train track that’s been crumpled up and stuck together in one spot, instead of letting the train move smoothly from one place to another, the train gets stuck on a big knot. That's what happens inside brain cells with neurofibrillary tangles.

These tangled ropes are part of what causes some kinds of memory problems and confusion, like those seen in dementia. It’s not magic, just messy strings inside our brains!