Assessment of the effects of Mild Head Injury, not only in terms of dysfunction but also of disability and quality of life. The ultimate goal is to capture comparative these changes, of the evolution and consequences of MHI to children and adults.Psychological Investigation was made on 96 children and 84 adults, to capture neuropsychological, emotional, behavioral and psychosocial aspects.Behavioral disorders were found mostly in adults and cognitive dysfunctions in children. Neurosurgeon should make a full assessment of the patient with mild head injury. Psychotherapy can intervene in the benefit of individuals.