A study compared the brains of 20 prisoners with a diagnosis of psychopathy with the brains of 20 other prisoners who committed similar crimes but were not diagnosed with psychopathy. These researchers found O a. a complete absence of the corpus callosum connecting the two hemispheres in psychopaths O b. the amygdala was connected to the occipital cortex, the temporal cortex, and the entorhinal cortex but not the frontal cortex O c. there was diffuse damage to the synaptic connectivity of neurons throughout the third interstial nucleus of the anterior hypothalamus O d. connectivity between the right amygdala and anterior vmPFC (Ventromedial Prefrontal Cortex) is reduced in psychopaths

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