Mechanistic link between right prefrontal cortical activity and anxious arousal revealed using transcranial magnetic stimulation in healthy subjects.

Journal Article (Clinical Trial;Journal Article)

Much of the mechanistic research on anxiety focuses on subcortical structures such as the amygdala; however, less is known about the distributed cortical circuit that also contributes to anxiety expression. One way to learn about this circuit is to probe candidate regions using transcranial magnetic stimulation (TMS). In this study, we tested the involvement of the dorsolateral prefrontal cortex (dlPFC), in anxiety expression using 10 Hz repetitive TMS (rTMS). In a within-subject, crossover experiment, the study measured anxiety in healthy subjects before and after a session of 10 Hz rTMS to the right dorsolateral prefrontal cortex (dlPFC). It used threat of predictable and unpredictable shock to induce anxiety and anxiety potentiated startle to assess anxiety. Counter to our hypotheses, results showed an increase in anxiety-potentiated startle following active but not sham rTMS. These results suggest a mechanistic link between right dlPFC activity and physiological anxiety expression. This result supports current models of prefrontal asymmetry in affect, and lays the groundwork for further exploration into the cortical mechanisms mediating anxiety, which may lead to novel anxiety treatments.

Full Text

Duke Authors

Cited Authors

  • Balderston, NL; Beydler, EM; Roberts, C; Deng, Z-D; Radman, T; Lago, T; Luber, B; Lisanby, SH; Ernst, M; Grillon, C

Published Date

  • March 2020

Published In

Volume / Issue

  • 45 / 4

Start / End Page

  • 694 - 702

PubMed ID

  • 31791039

Pubmed Central ID

  • PMC7021903

Electronic International Standard Serial Number (EISSN)

  • 1740-634X

Digital Object Identifier (DOI)

  • 10.1038/s41386-019-0583-5

Language

  • eng

Conference Location

  • England