Whatever the brain does

Whatever the brain does a lot, it gets good at

The Mind Map Journal

The meaning of the quote

To drive a London black cab, you first have to pass “The Knowledge.” Trainees spend 3 to 4 years riding a moped around the city, memorizing 25,000 streets and thousands of landmarks within a 6-mile radius of Charing Cross. Half of them quit before they finish.

Researchers scanned the brains of those who made it and found that their hippocampus, the part of the brain tied to memory and navigation, was measurably larger than in people who didn’t drive cabs for a living. The longer someone had been driving, the bigger it was. London bus drivers, who log just as many hours behind the wheel but follow the same fixed route every day, showed no such change.

That’s the quote in physical form. Repetition doesn’t just make you faster at a task. It reshapes the organ doing the task.

In 1949, psychologist Donald Hebb described how nerve cells learn. When one cell repeatedly helps fire another, the connection between them gets stronger. The idea became known as Hebbian theory, often summed up as “neurons that fire together, wire together.” Do a thing once, and a faint trail forms. Do it 1,000 times, and that trail becomes a road your brain reaches for automatically.

This works on more than skills you’re proud of. Spend an hour a day worrying, and your brain gets efficient at worrying. Spend it comparing yourself to strangers online, and that becomes the road it defaults to. James Clear makes a similar point in Atomic Habits.

Every action you repeat is a vote for the kind of person you’re becoming. The brain isn’t judging whether the repetition serves you. It notices what shows up often and makes it easier to do again.

That turns a scary problem into a practical one. You don’t need a personality transplant. You need to check what you’re practising.

Try this

1. Look at what you’ve been practising.
   List the 3 things you did most often in the last 30 days without planning to. Not your goals but your actual defaults. Checking your phone first thing. Snapping at your family when you’re tired. Reaching for sugar at 3 p.m.
2. Choose what you’d rather practise.
   Pick 1 skill or habit you’d rather your brain get good at. Give it a small, specific slot: 10 minutes of guitar before bed, 1 paragraph of writing before checking email or a walk after dinner instead of the couch.
3. Repeat it before you judge it.
   Keep showing up for the new habit instead of deciding after a few attempts that it isn’t working. Give your brain enough repetition to make the new behaviour more familiar.

Resources

• Hebbian theory (Wikipedia)
• How acquiring “The Knowledge” changes the brains of London cab drivers (Article)
• Navigation-related structural change in the hippocampi of taxi drivers (Paper)
• Atomic Habits (Book)