| A | B |
| DSM-V | the fifth version of the American Psychiatric Association’s Diagnostic and Statistical Manual of Mental Disorders. |
| anxiety | an unpleasant psychological state characterized by a vague, generalized apprehension or feeling that one is in danger. |
| phobia | an intense and irrational fear of a particular object or situation. |
| post-traumatic stress disorder | disorder in which victims of catastrophes or other traumatic events experience the original event in the form of dreams or flashback. |
| somatoform disorder | a psychological disorder marked by a pattern of recurring physical symptoms for which there is no apparent physical cause. |
| conversion disorder | a somatoform disorder characterized by changing emotional difficulties into a loss of a specific voluntary body function. |
| dissociative disorder | a disorder characterized by a disruption, split, or breakdown in a person’s normally integrated and functioning memory, identity, or consciousness. |
| dissociative amnesia | a dissociative disorder characterized by the inability to recall important personal events or information and usually associated with stressful events. |
| dissociative fugue | a dissociative disorder in which a person suddenly and unexpectedly travels away from home or work and is unable to recall the past. |
| dissociative identity disorder | a dissociative disorder in which a person exhibits two or more personality states, each with its own patterns of thinking, perceiving, behaving, and relating in the world. |
| schizophrenia | a group of severe psychotic disorders characterized by confused and disconnected thoughts, emotions, behavior, and perception. |
| delusions | a false belief, as of persecution or grandeur, that a person maintains in the face of contradictory evidence. |
| hallucinations | a false sensory perception that has no direct external cause. |
| major depressive disorder | a severe form of depression marked by at least two weeks of continually being in a bad mood, having no interest in anything, and getting no pleasure from activities. |
| bipolar disorder | a disorder in which a person’s mood inappropriately alternates between feelings of mania (euphoria) and depression. |
| personality disorders | maladaptive or inflexible ways of dealing with others and one’s environment. |
| antisocial personality | a personality disorder characterized by a pattern of irresponsibility, shallow emotions, lack of conscience, and violating the rights of others without feeling guilty or remorse. |
| psychological dependence | a strong, repetitive desire for use of a drug to such an extent that a person feels nervous and anxious without it. |
| addiction | a self-destructive pattern of drug abuse characterized by an overwhelming and compulsive desire to obtain and use the drug. |
| tolerance | the reaction of the body and brain to regular drug use, whereby a person needs an increased amount in order to produce the original effect. |
| withdrawal | the symptoms that occur after a person discontinues the use of a drug to which he or she has become addicted. |