Physiological differences exist between the brains of political conservatives and liberals.
Empirical neuroimaging studies indicate that physiological and structural differences exist between the brains of political conservatives and liberals, particularly in regions associated with emotion processing and conflict monitoring such as the amygdala and anterior cingulate cortex.
The retrieved papers include direct empirical evidence (such as structural MRI and fMRI studies) demonstrating correlations between political orientation and brain structure/function, supporting the claim.
Kanai R, Feilden T, Firth C, Rees G. Political orientations are correlated with brain structure in young adults.. 2011. https://doi.org/10.1016/j.cub.2011.03.017
This study found significant structural differences in gray matter volume between political liberals and conservatives, specifically in the anterior cingulate cortex and amygdala.
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Katabi N, Simon H, Yakim S, Ravreby I, Ohad T, Yeshurun Y. Deeper Than You Think: Partisanship-Dependent Brain Responses in Early Sensory and Motor Brain Regions.. 2023. https://doi.org/10.1523/jneurosci.0895-22.2022
This fMRI study demonstrated partisanship-dependent differences in neural activation and synchronization while processing political content, even extending to early sensory and motor regions.
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