Lövheim Cube of emotion[1] is a proposed theoretical model aiming at explaining the relationship between the monoamine neurotransmitters and the emotions. In the model, the three monoamine neurotransmitters serotonin,dopamine and noradrenaline forms the axes of a coordinate system, and the eight basic emotions, labeled according to the affect theory of Silvan Tomkins, are placed in the eight corners. The origin corresponds to a situation where no signal substance at all is released. The model hence proposes a direct relation between specific combinations of the levels of the signal substances and certain basic emotions:
(Source: cascadesofrantum)



