The 25CN-NBOH hydrochloride (a kind gift from Jesper L. Kristensen, University of Copenhagen) was dissolved in isotonic saline and applied subcutaneously (<10 mL/kg). The dose used (1.5 mg/kg) was found optimal for a 5-HT2AR-specific effect, as determined by a dose-response curve for 25CN-NBOH-induced head twitches (Buchborn et al., 2018). Experiments were performed under general anaesthesia using isoflurane (IsoFlo; Zoetis, UK) delivered in 100% oxygen, as detailed below.
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