Figure 1.
Experimental set-up. (A) Photograph of the plexi-glass box used for auditory fear conditioning. (B) Schematic of the set-up used for vagus nerve stimulation (VNS). Animals were connected to a stimulation isolation unit via a headcap from which two platinum-iridum wires lead subcutaneously to a custom-made “cuff-electrode” that is wrapped around the vagus nerve. (C and D) Photomicrographs of the cuff electrode used for VNS. (C) shows the surgical incision and the exposed vagus nerve before the cuff electrode is sutured around it.