The rationale for studying transmitter interactions to understand the neural bases of cognitive function.- Neurotransmitters and cognition.- Interactions between CRF and acetylcholine in the modulation of cognitive behaviour.- Forebrain dopaminergic-cholinergic interactions, attentional effort, psychostimulant addiction and schizophrenia.- Intraseptal cholinergic infusions alter memory in the rat: method and mechanism.- Modulation of visual perception and action by forebrain structures and their interactions in amphibians.- Neuromodulators of LTP and NCAMs in the amygdala and hippocampus in response to stress.- Central histaminergic system interactions and cognition.- Cholinergic, histaminergic, and noradrenergic regulation of LTP stability and induction threshold: cognitive implications.- Nicotinic-antipsychotic drug interactions and cognitive function.- Function and dysfunction of monoamine interactions in children and adolescents with AD/HD.- Prepulse inhibition mechanisms and cognitive processes: a review and model.