Overview
- Researchers used diffusion MRI tractography to examine limbic white matter pathways in 15 squirrel monkeys.
- Social dominance measures included normalized David’s scores along with observed aggression and submissive behaviors.
- Integrity of the right uncinate fasciculus showed the strongest correlation with higher social rank.
- Trends in the left uncinate fasciculus suggest potential bilateral involvement despite a clear right-hemispheric lateralization.
- The fornix served as a control tract and analyses accounted for age, weight, handedness, brain size and hormone levels to isolate dominance-related effects.