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Gut Feeling Meredith: In the early days of medicine, surgical students would perfect their sewing technique on tree branches. But most things are better when they're shared with someone else. And trust me,you can get pretty good at the along thing. Meredith: Why do we often run for the hills when we feel the slightest connection? Why do we feel compelled to fight what we're hard-wired to do? Maybe it's because when we find something or someone to hold onto,that feeling becomes like air.and we're terrified we're going to lose it. So, then why do so many people prefer being alone? Our brains and bodies are actually programmed to seek each other out and connect. Neurons fire when we talk to someone, think about someone,and they go haywire when we hold someone's hand. A brain study revealed that, when placed in an MRI,a patient's reward center lit up when another person sat in the room. Broken Together Meredith: Just like we need food and water, humans need each other. The insula lights up,and we are compelled to change our lives. But more often than not.the chemicals in our brains control us. Meredith: We'd like to imagine that we're in control. The insula is only about the size of a pea,but what it triggers in our bodies and, by extension, in our lives,can be epic. It's called the insula, and it's where desire starts. Season 15 With a Wonder and a Wild Desire Meredith: There is a portion of the cerebral cortex of your brain, folded deep within an area between the temporal and frontal lobes.