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. 2016 Oct 6;632:50–54. doi: 10.1016/j.neulet.2016.07.053

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© 2016 The Authors

This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).

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Fig. 2 — A. Cortical GABA concentration predicts visual intelligence. Correlation between the concentration of GABA/H₂0 (inst. units) and performance in the Matrix Reasoning IQ task. Line indicates least-squares regression fit. B. GABA concentration predicts strength of perceptual surround suppression. Correlation between the concentration of GABA/H20 (inst. units) and first-order suppression index SI₁ (open symbols) and second-order suppression index SI₂ (filled symbols). Lines indicates least-squares regression fit. Mean suppression indices averaged across eccentricities of 0°, 3°, 6° and 9°. Error bars, standard error of the mean. C. Visual intelligence is correlated with perceptual surround suppression. Correlation between the Matrix Reasoning IQ task scores and SI₁ (open symbols) and SI₂ (filled symbols). Mean suppression indices averaged across eccentricities of 0°, 3°, 6° and 9°. Error bars, standard error of the mean.