As you can see, the somatic theories of emotion incorporate many of the positions advanced in earlier theories by Charles Darwin and William James. They suggest that emotions have an adaptive function and they include an emphasis on the expression of emotion. They also accept that there are specific responses associated with specific emotions; these responses are facial rather than visceral. The somatic theories differ somewhat on the role of cognitions in the experience of emotions; some argue that emotion and cognition or separate systems whereas others allow a role for cognition and interpretation of emotions.