- Histamine H3 receptor-mediated impairment of contextual fear conditioning and in-vivo inhibition of cholinergic transmission in the rat basolateral amygdala. Passani, M.B., Cangioli, I., Baldi, E., Bucherelli, C., Mannaioni, P.F., Blandina, P. Eur. J. Neurosci. (2001)