Neuropsychology involves studying the brain mechanisms underlying the mind. A group of rehabilitation psychologists has also recently challenged the individual-based view of traditional neuropsychology, suggesting that the brain is a system that extends beyond the skull, interacting with other interpersonal, social, community and cultural systems. Most emphasis is usually placed on the assessment and management of the cognitive impairments resulting from brain injury. Even though emotional and social problems are a common consequence of brain injury, not much time is spent on addressing them. The sophisticated emotional 'machinery' of humans makes people able to coordinate their behaviours with other people through the expression and perception of feelings, and to align ourselves with other people's feelings. Patients with injuries to brain areas related to emotional reactivity can also have impairment of the we-centric space. This is because the inability to experience an emotion often goes with a difficulty in perceiving and resonating with the same emotions in others.