PART D – Psychological consequences of torture on individuals 37 F07.2 Postconcussional syndrome A syndrome that occurs following head trauma (usually sufficiently severe to result in loss of consciousness) and includes a number of disparate symptoms such as headache, dizziness, fatigue, irritability, difficulty in concentration and performing mental tasks, impairment of memory, insomnia, and reduced tolerance to stress, emotional excitement, or alcohol. Postcontusional syndrome (encephalopathy) Post-traumatic brain syndrome, nonpsychotic SCHIZOPHRENIA, SCHIZOTYPAL AND DELUSIONAL DISORDERS (F20-F29) F23 Acute and transient psychotic disorders A heterogeneous group of disorders characterized by the acute onset of psychotic symptoms such as delusions, hallucinations, and perceptual disturbances, and by the severe disruption of ordinary behaviour. Acute onset is defined as a crescendo development of a clearly abnormal clinical picture in about two weeks or less. For these disorders there is no evidence of organic causation. Perplexity and puzzlement are often present but disorientation for time, place and person is not persistent or severe enough to justify a diagnosis of organically caused delirium (F05.-). Complete recovery usually occurs within a few months, often within a few weeks or even days. If the disorder persists, a change in classification will be necessary. The disorder may or may not be associated with acute stress, defined as usually stressful events preceding the onset by one to two weeks. Under “F 23 Acute and Transient Psychotic Disorders”, see F23.0 Acute polymorphic psychotic disorder without symptoms of schizophrenia F23.1 Acute polymorphic psychotic disorder with symptoms of schizophrenia F 23.2 Acute schizophrenia-like psychotic disorder F 23.3 Other acute predominantly delusional psychotic disorders F 23.8 Other acute and transient psychotic disorders F23.9 Acute and transient psychotic disorder, unspecified Brief reactive psychosis NOS Reactive psychosis