A potential difficulty, but also an opportunity, relating to using neuroimaging evidence in legal cases arises from the difficulty brain researchers have in separating emotional and physical pain. We know that pain and emotion are tightly linked. In fact, “emotion” is in the very definition of pain. The IASP definition of pain is: “An unpleasant sensory and emotional experience associated with actual or potential tissue damage, or described in terms of such damage.” Yet, the legal system deals with “physical” versus “psychiatric” versus “emotional” pain in different ways.
Chronic pain is associated with anxiety, depression, and stress. These factors can exacerbate the pain, and pain can exacerbate them. Pain’s sensory and emotional components connect in a “feed-forward” cycle. It may not be possible to entirely separate the sensory and emotional components of pain, biologically or experientially. But it might be necessary for the purposes of legal cases, as important areas of law create sharp distinctions between physical and emotional, or body and mind.