TABLE 1.
Region | No. of voxels | Coordinates
|
BA | Significant effects and interactions | ||
---|---|---|---|---|---|---|
x | y | z | ||||
Greater response to HA than LA stimuli in HSSs (p < .001, two-tailed) | ||||||
Right hippocampus | 454 | 20 | −6 | −14 | 34 | |
Right insula | 36 | 20 | −16 | SS × Arousal* | ||
Left hippocampus | 962 | −22 | −28 | −8 | ||
Left insula | −34 | 12 | −16 | SS × Arousal* | ||
Left posterior medial OFC | 33 | −4 | 34 | −14 | 11 | SS × Arousal† |
| ||||||
Greater response to HA than LA stimuli in LSSs (p < .001, two-tailed) | ||||||
Anterior medial OFC | 18 | 0 | 58 | −12 | 11 | SS × Arousal* |
Left anterior cingulate | 28 | −10 | 44 | 10 | 32 | SS† |
| ||||||
Difference between HA and LA response greater for HSSs than for LSSs (p < .001, two-tailed) | ||||||
Right insula/IFG | 24 | 40 | 16 | 10 | SS × Arousal* | |
| ||||||
Greater response to negative than positive HA stimuli in LSSs (p < .005, two-tailed) | ||||||
Right putamen | 41 | 30 | −12 | 0 | SS × Valence* | |
| ||||||
Greater response to positive than negative HA stimuli in LSSs (p < .001, two-tailed) | ||||||
Left putamen | 49 | −22 | 20 | 4 | SS × Valence × Arousal* |
Note. The first two panels present results comparing responses to high-arousal (HA) and low-arousal (LA) stimuli in high sensation seekers (HSSs) and low sensation seekers (LSSs), the third panel presents results comparing differential response to HA and LA stimuli in HSSs and LSSs, and the last two panels present results comparing responses to positive and negative HA stimuli in LSSs. BA = Brodmann’s area; IFG = inferior frontal gyrus; OFC = orbitofrontal cortex; SS = sensation seeking.
p = .077.
p < .05.