In this latest fMRI investigation into superior fluid intelligence, the frontal-parietal networks again emerge as important in a visualspatial problem solving paradigms given to superior-g subjects, but the posterior parietal lobe emerges as the most critical factor separating superior from average problem solving and reasoning ability.
This is a shift in thinking. For quite some time, superior intelligence has had been thought to reside in the frontal lobe activity. Some of the bias of 'frontal' intelligence came from lesion studies - and this is probably not the best way to see how 'superior' problem solvers were better than 'average' problem solvers.
The study is also interesting to consider for its implications for education. Are we doing enough to teach problem solving? And what might be the best approaches to teaching representational and fluid analytical thinking?
(BTW: The superior-g subjects were chosen by having won first or second prize in nationwide Science / Math Olympiad, teacher & principal recommendations, and successful performance on a novel problem solving test)
Neural Correlates of Superior Intelligence
Neurobiology of Intelligence
Neural Mechanisms of Fluid Intelligence