Neuroanatomical correlates of extraversion and neuroticism
report a structural neuroimaging study with magnetic resonance imaging on the personality traits neuroticism and extraversion.
The personality was assessed with NEO-FFI and cortical thickness was estimated with Freesurfer.
The group of researchers has also written a similar article with an elderly subject group: Neuroanatomical correlates of personality in the elderly.
|Subject group (help)
||28 / 11 / 17
||24.0 ±2.9 (20–34)
A group of 28 right-handed subjects with 11 males and 17 females were included in the study.
The American group had a mean age of 24.0 with a range from 20 to 34.
The researchers looked on all 5 NEO-FFI factors but found only significant correlation for extraversion and neuroticism (page 1814).
The researchers also examined the amygdala volume for correlation with personality traits neuroticism and extraversion and found no significant correlation.
The neuroimages were linearly transformed to the Talairach atlas (page 1811, column 1).
For this method the Whole brain segmentation: automated labeling of neuroanatomical structures in the human brain by Fischl and others, 2002 were cited.
P-value threshold were determined differently inside and outside prefrontal cortex (PFC): Both Bonferroni corrected with respect to the PFC or the whole brain, respectively.
 Inverse correlation between cortical thickness and extraversion
Talairach coordinates in the text on pages 1812-1813.
 Inverse correlation between cortical thickness and neuroticism
One coordinate listed in text on page 1813.