Effective Connectivity Between Broca's Area and Amygdala As a Mechanism of Top-down Control in Worry
Overview
Authors
Affiliations
Individuals higher in trait worry exhibit increased activation in Broca's area during inhibitory processing tasks. To identify whether such activity represents an adaptive mechanism supporting top-down control, functional and effective connectivity of Broca's area were investigated during a task of inhibitory control. fMRI data obtained from 106 participants performing an emotion-word Stroop task were examined using psychophysiological interaction and Granger Causality (GC) analyses. Findings revealed greater directed connectivity from Broca's to amygdala in the presence of emotional distraction. Furthermore, a predictive relationship was observed between worry and the asymmetry in effective connectivity, with worriers exhibiting greater directed connectivity from Broca's to amygdala. When performing the task, worriers with greater GC directional asymmetry were more accurate than worriers with less asymmetry. Present findings indicate that individuals with elevated trait worry employ a mechanism of top-down control in which communication from Broca's to amygdala fosters successful compensation for interference effects.
Carlson 2nd K, Smolker H, Smith L, Snyder H, Synder H, Hankin B Cogn Affect Behav Neurosci. 2025; .
PMID: 39870976 DOI: 10.3758/s13415-024-01262-0.
Oscillatory network markers of subcallosal cingulate deep brain stimulation for depression.
Scherer M, Harmsen I, Samuel N, Elias G, Germann J, Boutet A Brain Stimul. 2023; 16(6):1764-1775.
PMID: 38061548 PMC: 10947774. DOI: 10.1016/j.brs.2023.11.016.
The dimensional structure of internalizing psychopathology: Relation to diagnostic categories.
Snyder H, Silton R, Hankin B, Smolker H, Kaiser R, Banich M Clin Psychol Sci. 2023; 11(6):1044-1063.
PMID: 37982000 PMC: 10655959. DOI: 10.1177/21677026221119483.
Bulut T Brain Behav. 2023; 13(7):e3046.
PMID: 37132333 PMC: 10338813. DOI: 10.1002/brb3.3046.