well, here are the things we do know. In psychology and philosophy, emotion is a subjective, conscious experience that is characterized primarily by psychophysiological expressions, biological reactions, and mental states. Emotion is often associated and considered reciprocally influential with mood, temperament, personality, disposition, and motivation,[citation needed] as well as influenced by hormones and neurotransmitters such as dopamine, noradrenaline, serotonin, oxytocin, cortisol and GABA. Wikipedia) Empathy is an emotion. the brain makes the body respond with emotions. They are linked. I think, there is a break there in psychopaths/sociopaths. Here's a link, I don't know if it's valid. I don't have time to do any more research right now. But if this "new research" is true, I think this is an indication of what we are discussing. Psychopathy linked to brain abnormalities | KurzweilAI