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PeFLH stimulation inhibited PnO neuronal activity. A train of electrical stimuli (50 Hz; 50 μA; 500 ms of duration) in the PeFLH area (vertical arrow) evoked a long-lasting inhibition of PnO neurons (upper trace). The inhibitory effect was blocked by the iontophoretic application of the GABAA receptor antagonist bicuculline (10 mM) into the PnO nucleus (lower trace). Inset shows the stimulated PeFLH area in the Nissl stained section (arrow).
