ArticleThe Journal of physiology2017
Inhibitory modulation of medial prefrontal cortical activation on lateral orbitofrontal cortex-amygdala information flow.
Article in The Journal of physiology, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
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3 citing papers in PubMed, 7 citations in OpenAlex.
- Dissociable and Paradoxical Roles of Rat Medial and Lateral Orbitofrontal Cortex in Visual Serial Reversal Learning.Cerebral cortex (New York, N.Y. : 1991) · 2020Article
- Novel analgesic effects of melanin-concentrating hormone on persistent neuropathic and inflammatory pain in mice.Scientific reports · 2018Article
- Exploring Age-Related Changes in Resting State Functional Connectivity of the Amygdala: From Young to Middle Adulthood.Frontiers in aging neuroscience · 2018Article
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Authors and funding
2 authors at 1 institution in 1 country.
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No grant is acknowledged in the PubMed record.
Abstract
key pointsThe basolateral complex of the amygdala (BLA) receives input from the lateral orbitofrontal cortex (lOFC) for cue-outcome contingencies and the medial prefrontal cortex (mPFC) for emotion control. Here we examined how the mPFC modulates lOFC-BLA information flow. We found that the majority of BLA neurons responsive to lOFC stimulation were also responsive to mPFC stimulation. Activation of the mPFC exerted an inhibitory modulation of the lOFC-BLA pathway, which was reversed with intra-amygdala blockade of GABAergic receptors. mPFC tetanus potentiated the lOFC-BLA pathway, but did not alter its inhibitory modulatory gating. These results show that the mPFC potently inhibits lOFC drive of the BLA in a GABA-dependent manner, which is informative in understanding the normal and potential pathophysiological state of emotion and contingency associations in regulating behaviour. ABSTRACT: Several neocortical projections converge onto the basolateral complex of the amygdala (BLA), including the lateral orbitofrontal cortex (lOFC) and the medial prefrontal cortex (mPFC). Lateral orbitofrontal input to the BLA is important for cue-outcome contingencies, while medial prefrontal input is essential for emotion control. In this study, we examined how the mPFC, specifically the infralimbic division of the mPFC, modulates lOFC-BLA information flow, using combined in vivo extracellular single-unit recordings and pharmacological manipulations in anaesthetized rats. We found that the majority (over 95%) of BLA neurons that responded to lOFC stimulation also responded to mPFC stimulation. Compared to basal condition, pharmacological (N-methyl-d-aspartate) or electrical activation of the mPFC exerted an inhibitory modulation of the lOFC-BLA pathway, which was reversed with intra-amygdala blockade of GABAergic receptors with combined GABA
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