Specialization of Amygdala Subregions in Emotion Processing

Date
2024-04-09
Authors
Labuschagne, Izelle
Dominguez, Juan F
Grace, Sally
Mizzi, Simone
Henry, Julie D
Peters, Craig
Rabinak, Christine A
Sinclair, Erin
Lorenzetti, Valentina
Terrett, Gill
Supervisor
Item type
Journal Article
Degree name
Journal Title
Journal ISSN
Volume Title
Publisher
Wiley
Abstract

The amygdala is important for human fear processing. However, recent research has failed to reveal specificity, with evidence that the amygdala also responds to other emotions. A more nuanced understanding of the amygdala's role in emotion processing, particularly relating to fear, is needed given the importance of effective emotional functioning for everyday function and mental health. We studied 86 healthy participants (44 females), aged 18–49 (mean 26.12 ± 6.6) years, who underwent multiband functional magnetic resonance imaging. We specifically examined the reactivity of four amygdala subregions (using regions of interest analysis) and related brain connectivity networks (using generalized psycho‐physiological interaction) to fear, angry, and happy facial stimuli using an emotional face‐matching task. All amygdala subregions responded to all stimuli (jats:italicp</jats:italic>‐FDR < .05), with this reactivity strongly driven by the superficial and centromedial amygdala (jats:italicp</jats:italic>‐FDR < .001). Yet amygdala subregions selectively showed strong functional connectivity with other occipitotemporal and inferior frontal brain regions with particular sensitivity to fear recognition and strongly driven by the basolateral amygdala (jats:italicp</jats:italic>‐FDR < .05). These findings suggest that amygdala specialization to fear may not be reflected in its local activity but in its connectivity with other brain regions within a specific face‐processing network.

Description
Keywords
1109 Neurosciences , 1702 Cognitive Sciences , Experimental Psychology , 3209 Neurosciences , 5202 Biological psychology , 5204 Cognitive and computational psychology
Source
Human Brain Mapping, ISSN: 1065-9471 (Print); 1097-0193 (Online), Wiley, 45(5). doi: 10.1002/hbm.26673
Rights statement
© 2024 The Authors. Human Brain Mapping published by Wiley Periodicals LLC. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.