Know Your Place: Neural Processing of Social Hierarchy in Humans

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Know Your Place: Neural Processing of Social Hierarchy in Humans Caroline F. Zink, Yunxia Tong, Qiang Chen, Danielle S. Bassett, Jason L. Stein, Andreas Meyer-Lindenberg  Neuron  Volume 58, Issue 2, Pages 273-283 (April 2008) DOI: 10.1016/j.neuron.2008.01.025 Copyright © 2008 Elsevier Inc. Terms and Conditions

Figure 1 Schematic Diagram of the Experimental Design Each round in the tasks consisted of three phases: viewing the other player, playing the game, and viewing the outcomes. (A) In Experiment #1 (stable hierarchy), during the game phase participants pressed a button as soon as the blue circle changed to green. The initial hierarchical rankings did not change throughout the session. (B) In Experiment #2 (unstable hierarchy), during the game phase participants pressed a button to indicate which box contained more dots. The hierarchical rankings were updated throughout the session based on performance. Neuron 2008 58, 273-283DOI: (10.1016/j.neuron.2008.01.025) Copyright © 2008 Elsevier Inc. Terms and Conditions

Figure 2 Significant Activations for the Contrast, ‘Superior Player > Inferior Player’ in Experiment #1, or Stable Hierarchy Displayed are (A) significant (p < 0.005, FDR-corrected) activations in occipital/parietal cortex [−24, −96, 9; 42, −81, −6], dorsal lateral prefrontal cortex [−36, 3, 42; 42, 30, 21], parahippocampal cortex [−21, −27, −9; 27, −24, −12], and ventral striatum [−3, 15, −6; 6, 18, −3], and (B) plots of the effect sizes (parameter estimates) when viewing the superior and inferior other player, extracted from the peak voxels in each activated region. Bar plots represent means and standard errors across participants. Neuron 2008 58, 273-283DOI: (10.1016/j.neuron.2008.01.025) Copyright © 2008 Elsevier Inc. Terms and Conditions

Figure 3 Significant Activations for the Contrast, ‘Superior Player > Inferior Player,’ Consistently Observed in Both Experiment #1 (Top) and Experiment #2 (Bottom) Significant (p < 0.005, FDR-corrected) activations were observed in occipital/parietal cortex (Experiment #1: [−24, −96, 9; 42, −81, −6]; Experiment #2: [−27, −93, 6; 36, −93, 3]), dorsal lateral prefrontal cortex (Experiment #1: [−36, 3, 42; 42, 30, 21]; Experiment #2: [45, 9, 27]), parahippocampal cortex (Experiment #1: [−21, −27, −9; 27, −24, −12]; Experiment #2: [−24, −27, −12; 27, −21, −15]), and ventral striatum (Experiment #1: [−3, 15, −6; 6, 18, −3]; Experiment #2: [9, 9, −3]). Neuron 2008 58, 273-283DOI: (10.1016/j.neuron.2008.01.025) Copyright © 2008 Elsevier Inc. Terms and Conditions

Figure 4 Correlations between Brain Activity and the Level of Positive Affect Experienced by the Participant When in the Top Hierarchical Position in Areas Uniquely Activated in Experiment #2 for the Contrast, ‘Superior Player > Inferior Player’ Displayed are significant (p < 0.05) correlations between the level of positive affect experienced by the participant as the three star player and parameter estimates at peak activations in the thalamus (p = 0.011; r = 0.51), amygdala (p = 0.017; r = 0.481) and posterior cingulate (p = 0.018; r = 0.478) when viewing the superior player. Neuron 2008 58, 273-283DOI: (10.1016/j.neuron.2008.01.025) Copyright © 2008 Elsevier Inc. Terms and Conditions

Figure 5 Significant Activations to Outcomes Associated with Hierarchical Value in Experiment #2, Displayed at p < 0.001, Uncorrected (A) Activations for the contrast, “subject lost/inferior won > subject lost/inferior lost,” observed in occipital cortex [−36, −90, −6; 33, −87, 9], insula [−42, 15, −6; 36, 24, 6], midbrain [−3, −30, −12], and ventral straitum [−6, 6, −3; 9, 9, −3]. Also displayed are significant correlations between the level of positive affect experienced by the participant as the three star player and parameter estimates at peak activations in the ventral striatum (p = 0.008; r = 0.528) and insula (p = 0.030; r = 0.444) when subject lost/inferior won. (B) Activations for the contrast, “subject won/superior lost > subject won/superior won,” observed in occipital cortex [−48, −72, 0; 45, −84, −6], premotor cortex [−39, −6, 57; 45, 0, 42], precuneus [−9, −81, 45; −24, −78, 33; 21, −87, 42], midbrain [−3, −21, −21; 9, −24, −6], pre-SMA [3, 9, 63], MPFC [3, 42, 39], and anterior cingulate [9, 42, 18]. Not shown are activations in orbitofrontal cortex [33, 21, −18] and caudate [−6, 6, 9]. Also displayed are significant negative correlations between trait dominance/submissiveness scores and parameter estimates at peak activations in the premotor cortex (p = 0.04; r = −0.453) when subject won/superior lost. Neuron 2008 58, 273-283DOI: (10.1016/j.neuron.2008.01.025) Copyright © 2008 Elsevier Inc. Terms and Conditions