within his paper titled “A proposed mechanism of emotion.” The model is known as the Papez circuit. the Papez circuit highlighted the presence of neuronal pathways between vestibular system and limbic system. The vestibular apparatus is in the inner ear this apparatus coordinates the body balance and movement. this requires extensive neuronal networking. Vestibular stimulation can cause changes in mood and emotion. vestibular stimulation by influencing hypothalamus can impact emotions either independently or as part of the general limbic system networks. These emotions can include extreme passivity, loss of drive/motivation, excessive eating and drinking, and rage and violent behavior. Studies show Romantic Love uses reward and motivation systems to focus on a specific individual. The limbic cortical regions process individual emotion factors. In A General Theory of Love, three professors of psychiatry from UCSF provide an overview of the scientific theories and findings relating to the role of the limbic system in love, attachment and social bonding. They advance the hypothesis that our nervous systems are not self-contained, but rather demonstrably attuned to those around us and those with whom we are most close. This empathy, which they call limbic resonance, is a capacity which we share, along with the anatomical characteristics of the limbic areas of the brain, with all other mammals. Their work builds on previous studies of the importance of physical contact and affection in social and cognitive development, such as the experiments conducted by Harry Harlow on rhesus monkeys, which first established the biological consequences of isolation. Brain imaging Brain scanning techniques such as functional magnetic resonance imaging have been used to investigate brain regions that seem to be involved in producing the human experience of love. In 2000, a study led by Semir Zeki and Andreas Bartels of University College London concluded that at least two areas of the brain become more active when in love. These were foci in the media insula, which the brain associates with instinct, and part of the anterior cingulate cortex, which is associated with feelings of euphoria. Ortigue et al. found that an unconscious prime of the name of a romantic partner activated similar brain regions as when subjects were consciously aware of seeing partners' faces. Subliminal priming with either a beloved's name or a favorite hobby activated emotion and motivational brain regions: caudate nucleus, insula, bilateral fusiform regions, parahippocampal gyrus, right angular gyrus, occipital cortex, and cerebellum. However,