a1 Departments of Neuroradiology, Neurology and Radiology, Johns Hopkins Hospital, Baltimore, MD 21287 [email protected] http://www.rad.jhmi.edu/residents/residents/prabhakaran.htm
a2 School of Behavioral and Brain Sciences, University of Texas at Dallas, Richardson, TX 75080. [email protected] http://www.utdallas.edu/bbs/staff_faculty/faculty/rypma.html
A well-recognized framework for modeling human intelligence centers around Spearman's g, a common central factor accounting for individual differences in cognitive performance across a variety of complex tasks (Spearman 1904). The neural basis of g may be better characterized by posterior-frontal integration, rather than parietal, which may be just one of many posterior regions that are controlled by the prefrontal cortex (PFC).