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000910570 1001_ $$0P:(DE-HGF)0$$aSchlüter, Caroline$$b0
000910570 245__ $$aNeurite density imaging in amygdala nuclei reveals interindividual differences in neuroticism
000910570 260__ $$aNew York, NY$$bWiley-Liss$$c2022
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000910570 520__ $$aNeuroticism is known to have significant health implications. While previous research revealed that interindividual differences in the amygdala function are associated with interindividual differences in neuroticism, the impact of the amygdala's structure and especially microstructure on variations in neuroticism remains unclear. Here, we present the first study using NODDI to examine the association between the in vivo microstructural architecture of the amygdala and neuroticism at the level of neurites. We, therefore, acquired brain images from 221 healthy participants using advanced multi-shell diffusion-weighted imaging. Because the amygdala comprises several nuclei, we, moreover, used a high-resolution T1 image to automatically segment the amygdala into eight different nuclei. Neuroticism and its facets have been assessed using the NEO-PI-R. Finally, we associated neuroticism and its facets with the volume and microstructure of the amygdala nuclei. Statistical analysis revealed that lower neurite density in the lateral amygdala nucleus (La) was significantly associated with higher scores in depression, one of the six neuroticism facets. The La is the sensory relay of the amygdala, filtering incoming information based on previous experiences. Reduced neurite density and related changes in the dendritic structure of the La could impair its filtering function. This again might cause harmless sensory information to be misevaluated as threatening and lead to the altered amygdala responsivity as reported in previous studies investigating the functional correlates of neuroticism and neuroticism-related disorders like depression.
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000910570 7001_ $$0P:(DE-HGF)0$$aFraenz, Christoph$$b1
000910570 7001_ $$0P:(DE-Juel1)185938$$aFriedrich, Patrick$$b2$$ufzj
000910570 7001_ $$0P:(DE-HGF)0$$aGüntürkün, Onur$$b3
000910570 7001_ $$0P:(DE-HGF)0$$aGenç, Erhan$$b4$$eCorresponding author
000910570 773__ $$0PERI:(DE-600)1492703-2$$a10.1002/hbm.25775$$gVol. 43, no. 6, p. 2051 - 2063$$n6$$p2051 - 2063$$tHuman brain mapping$$v43$$x1065-9471$$y2022
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