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• W2110552169 abstract "The basal amygdala (BA) plays a key role in mediating the facilitating effects of emotions on memory. Recent findings indicate that this function depends on the ability of BA neurons to generate coherent oscillatory activity, facilitating synaptic plasticity in target neurons. However, the mechanisms allowing BA neurons to synchronize their activity remain poorly understood. Here, we aimed to shed light on this question, focusing on a slow periodic inhibitory oscillation previously observed in the BA in vitro. Paired patch recordings showed that these large inhibitory postsynaptic potentials (IPSPs) occur almost synchronously in BA projection neurons, that they were typically not preceded by excitatory postsynaptic potentials (EPSPs), and that they had little or no correlate in neighboring amygdala nuclei or cortical fields. The initial phase of the IPSPs was associated with an increase in membrane potential fluctuations at 50–100 Hz. In keeping with this, the IPSPs seen in projection cells were correlated with repetitive firing at 50–100 Hz in presumed interneurons and they could be abolished by picrotoxin. However, the IPSPs were also sensitive to 6-cyano-7-nitroquinoxaline-2,3-dione, implying that they arose from the interplay between glutamatergic and GABAergic BA neurons. In support of this idea, we identified a small subset of projection cells (15%), positively identified as such by retrograde labeling from BA projection sites, that began firing shortly before the IPSP onset and presumably drove interneuronal firing. These results add to a rapidly growing body of data indicating that the BA contains at least two distinct types of projection cells that vary in their relation with interneurons and extra-amygdala targets." @default.
• W2110552169 created "2016-06-24" @default.
• W2110552169 creator A5009799367 @default.
• W2110552169 creator A5044043701 @default.
• W2110552169 date "2011-02-01" @default.
• W2110552169 modified "2023-09-24" @default.
• W2110552169 title "Synaptic Interactions Underlying Synchronized Inhibition in the Basal Amygdala: Evidence for Existence of Two Types of Projection Cells" @default.
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• W2110552169 doi "https://doi.org/10.1152/jn.00732.2010" @default.
• W2110552169 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/3357011" @default.
• W2110552169 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/21084688" @default.
• W2110552169 hasPublicationYear "2011" @default.
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