This is your brain on movies

“By using a rich stimulus like a movie, we can drive many regions of the cortex very efficiently. For example, sensory regions will be active to process different features of the movie, and high-level areas will be active to extract semantic and contextual information,” says Reza Rajimehr, a research scientist in the McGovern Institute and the lead author of a paper on the work. “By activating the brain in this way, now we can distinguish different areas or different networks based on their activation patterns.” Using high-resolution fMRI data collected by an NIH-funded consortium, the researchers analyzed brain activity from 176 people as they watched a variety of movie clips. Then they used a machine-learning algorithm to analyze the activity patterns of each brain region. What they found was 24 networks with different activity patterns and functions. Some are located in sensory areas such as the visual or auditory cortex, while others respond to features such as actions, language, ... Read full article.