Editing Intelligence quotient (section)

==Brain anatomy==
{{Main|Neuroscience and intelligence}}

Several neurophysiological factors have been correlated with intelligence in humans, including the ratio of brain weight to body weight and the size, shape, and activity level of different parts of the brain. Specific features that may affect IQ include the size and shape of the frontal lobes, the amount of blood and chemical activity in the frontal lobes, the total amount of gray matter in the brain, the overall thickness of the cortex, and the glucose metabolic rate.<ref>{{cite journal | last1 = Deary | first1 = I.J. | last2 = Penke | first2 = L. | last3 = Johnson | first3 = W. | year = 2010 | title = The neuroscience of human intelligence differences | url = http://www.larspenke.eu/pdfs/Deary_Penke_Johnson_2010_-_Neuroscience_of_intelligence_review.pdf | journal = Nature Reviews Neuroscience | volume = 11 | issue = 3| pages = 201–211 | doi=10.1038/nrn2793 | pmid=20145623| s2cid = 5136934| hdl = 20.500.11820/9b11fac3-47d0-424c-9d1c-fe6f9ff2ecac | hdl-access = free }}</ref>