Brain Activity During Complex Task (VIDEO) University of California - Berkeley This video is under embargo. Please login to access this video. To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video Caption For a more difficult task, saying a word that is the opposite of another word, people's brains required 2-3 seconds to detect (yellow), interpret and search for an answer(red) and respond (blue), with sustained prefrontal lobe activity (red) to coordinate all areas of the brain involved. Credit video by Avgusta Shestyuk and Robert Knight, UC Berkeley Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.