The Human Cortex
Imagine your friend Cindy stands in front of you looking to her right, so that you can look directly at her left ear. And imagine that that somehow you could take her skull off and see her brain underneath (painlessly and temporarily, of course). This is what you'd see:
Well, hers would be all gray, actually. The "Slice of Life" people, who graciously granted permission to use these slides, have colored the different "lobes" or main sections of the brain to help you find your way around Cindy's head:
|Position||Color||Lobe Name||Function (very oversimplified)|
|top||white||Parietal||sensation and muscle control|
|front||blue||Frontal||abstract thought?; ideas into words|
|bottom||green||Temporal||creating memory; names; words into speech|
Notice that some of the functions of the brain are found in specific places. This has been learned over years, starting with the work of a fellow named Penfield, who was a surgeon. When people have surgery on their brain, they only need a local anesthetic to control the pain from cutting their skin and skull, and can be awake and alert while the surgeon works on their brain. So Penfield made notes while poking at different places and discovered that people would see lights and spots if he poked at the back (occipital) lobe; and feel things if he poked at the back portion of the parietal area, or move body parts if he poked at the front portion of that lobe.
Use your "back" button to return to the Introduction and your Tour Options.