Deficient THC-induced short-term depression during 5 Hz LTD induction is not reversed by GAT-211. A, Representative traces of postsynaptic responses of the first and 160st second of the 5-Hz stimulation (eg, LTD induction protocol). Upper trace Ctrl, lower trace Ext animal. B, Average temporal dynamic of postsynaptic activation during the 5-Hz LTD induction for ctrl and ext. C, Bar graph summarizing the average response to pulses 400 to 900 of LTD induction. N = shown as cells/animals recorded. *P < .05 comparing treatment groups