Editing Abstraction (section)

===In neurology===
{{Further|Intelligence|Mental rotation|Mental operations}}
A recent meta-analysis suggests that the verbal system has a greater engagement with abstract concepts when the perceptual system is more engaged in processing concrete concepts. This is because abstract concepts elicit greater brain activity in the inferior frontal gyrus and middle temporal gyrus compared to concrete concepts which elicit greater activity in the posterior cingulate, precuneus, fusiform gyrus, and parahippocampal gyrus.<ref>{{cite journal | last1 = Wang | first1 = Jing | last2 = Conder | first2 = Julie A. | last3 = Blitzer | first3 = David N. | last4 = Shinkareva | first4 = Svetlana V. | s2cid = 22661328 | year = 2010 | title = Neural Representation of Abstract and Concrete Concepts: A Meta-Analysis of Neuroimaging Studies | journal = Human Brain Mapping | volume = 31| issue = 10| pages = 1459–1468| doi = 10.1002/hbm.20950 | pmid = 20108224 | pmc = 6870700 }}</ref> Other research into the [[human brain]] suggests that the left and right hemispheres differ in their handling of abstraction. For example, one meta-analysis reviewing human brain lesions has shown a left hemisphere bias during tool usage.<ref>James W. Lewis "Cortical Networks Related to Human Use of Tools" '''12''' (3): 211–231 ''The Neuroscientist'' (June 1, 2006).</ref>