Are GPS navigational devices damaging our sense of direction?
London cabbies must take a test called “The Knowledge” which requires them to memorize 25,000 streets and thousands of landmarks. Here is a link to the Knowledge; http://www.the-knowledge.org.uk/main/
Apparently, the back part of the hippocampus in the brains of cabbies is enlarged compared with brains of the average person. However, the front part of the hippocampus shrinks.