说话人1 00:00
 Now listen to part of a lecture from a neuroscience class. Neuroscience studying memory recently conducted some research to investigate the effects of long term training on the structure of the brain. In one particular study, the researchers selected a group of adults making sure that everyone was at least in their 20s who were going to train to become taxi drivers in London, which is a huge city known for its confusing streets that are really quite difficult to navigate. The researchers were interested in the effects of the training, specifically they wanted to investigate the impact of this taxi driving training on the hippocampus. The part of the brain responsible for things like long term memory and spatial navigation.

So at the start of the study, the researchers performed brain scan is on the participate PSL the train iis, and they generated an image of each person's brain with a focus on the hippocampus. And then these participants underwent the train, which isn't just a quick course. It's an intensive process spending about 4 years in which the people have to.
说话人2 01:06
 To learn all of.
说话人1 01:07
 London streets, land marks, tourist attraction, cz, they drive around the city, learn different roots in short cuts. Essentially they.
说话人2 01:14
 They have to learn and.
说话人1 01:15
 And memorize every bit of the city's layout, driving around the city day after day, week, after week, year, after year. At the end of this 4 year training, the researchers again took scans of the participants brains focusing on the hippocampus. What they found was that after these years of repetitive dream, each participant hippocampus had become markedly larger.