Box 3 Figure.
Synaptic plasticity. Pre- and postsynaptic signaling cascades responsible for long-term potentiation/depression (LTP/LTD). Abbreviations: MEK-ERK, mitogen-activated protein kinase kinase (MEK)–extracellular signal-regulated kinase (ERK); AKT, protein kinase B; PLC, phospholipase C; PI3K, phosphoinositide 3-kinase; CICR, calcium-induced calcium release; PLD, phospholipase D; eCB, endocannabinoid; µ/δOR, µ/δ opioid receptor; 5-HT1bR, 5-HT type 1b receptor; other abbreviations as in text.