Neuropsychology addresses how brain regions associated with emotional processing are involved in moral cognition by studying the biological mechanisms that underlie human choices and behavior. Like social psychology, it seeks to determine, not how we "should", but how we "do" behave—though neurologically. For instance, what happens in the brain when we favor one response over another, or when it is difficult to make any decision? Studies of clinical populations, including patients with VMPC (ventromedial prefrontal cortex) damage, reveal an association between impairments in emotional processing and impairments in moral judgement and behavior. These and other studies conclude that not only are emotions engaged during moral cognition, but that emotions, particularly those mediated by VMPC, are in fact critical for morality.