Figure 5. Glucocorticoids increase glutamate levels, N-methyl-D-aspartate (NMDA) receptors, calcium currents, 5-hydroxytryptamine (5-HT) turnover, and 5-HT₂ receptors, decrease 5-HT_1A receptors, and alter subunit expression of GABAa receptors. A. Cross-section of dorsal hippocampus. B. Blow-up of CA3 region. C. CA3 neurons highlighting stratum lucium (SL), where mossy fiber terminals form synaptic contacts .GABA, γ-aminobutyric acid; DG, dentate gyrus; SR, stratum radiatum; SP, stratum pyramidale; SO, stratum oriens.