General intelligence is found in several specific places in the brain, determined by a network of regions across both sides of the brain, researchers at CalTech, the University of Iowa, the University of Southern California, and the Autonomous University of Madrid have found.

The researchers mapped the locations of brain lesions of 241 patients and correlated that with each patient's IQ score to produce a map of the brain regions that influence intelligence.

The brain regions important for general intelligence are found in several specific places (orange regions shown on the brain on the left). The big orange regions in the right image are connections between the brain regions in the image on the left. (PNAS) (Source: http://www.physorg.com/news186071954.html)