Denton distinguishes between primordial emotions, " imperious states of arousal and compelling intentions to act " ( p . 7 ) driven by activation of interoceptors and involving ancient, lower brain regions such as the medulla, midbrain and hypothalamus, and " classic " emotions, such as anger, fear and love, driven by distance receptors ( vision, hearing, olfaction ) and mediated by higher, more recently evolved brain regions.