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A hallucination is a perception in the absence of an external stimulus that has the compelling sense of reality. [4] Hallucination is a combination of two conscious states of brain: wakefulness and REM sleep. [5] They are distinguishable from several related phenomena, such as dreaming (REM sleep), which does not involve wakefulness ...
Schizophrenia is a mental disorder that is expressed in abnormal mental functions, a loss of one's sense of identity and self, a compromised perception of reality, and disturbed behavior. The signs and symptoms of childhood schizophrenia are similar to those of adult-onset schizophrenia.
In the early 20th century, the psychiatrist Kurt Schneider categorized the psychotic symptoms of schizophrenia into two groups – hallucinations and delusions. The hallucinations were listed as specific to auditory and the delusions included thought disorders. These were seen as important symptoms, termed first-rank. The most common first-rank ...
Mass psychogenic illness (MPI), also called mass sociogenic illness, mass psychogenic disorder, epidemic hysteria or mass hysteria, involves the spread of illness symptoms through a population where there is no infectious agent responsible for contagion. [1] It is the rapid spread of illness signs and symptoms affecting members of a cohesive ...
Tactile hallucinations are recurrent symptoms of neurological diseases such as schizophrenia, Parkinson's disease, Ekbom's syndrome and delirium tremens. Patients who experience phantom limb pains also experience a type of tactile hallucination. Tactile hallucinations are also caused by drugs such as cocaine and alcohol.
Delirium tremens (DTs; lit. 'mental disturbance with shaking') is a rapid onset of confusion usually caused by withdrawal from alcohol. [2] When it occurs, it is often three days into the withdrawal symptoms and lasts for two to three days. [2] Physical effects may include shaking, shivering, irregular heart rate, and sweating. [1]
Alice in Wonderland Syndrome (AIWS), also known as Todd's Syndrome or Dysmetropsia, is a neurological disorder that distorts perception.People with this syndrome may experience distortions in their visual perception of objects, such as appearing smaller or larger (), or appearing to be closer or farther than they are.
Periodic fever syndromes are a set of disorders characterized by recurrent episodes of systemic and organ-specific inflammation.Unlike autoimmune disorders such as systemic lupus erythematosus, in which the disease is caused by abnormalities of the adaptive immune system, people with autoinflammatory diseases do not produce autoantibodies or antigen-specific T or B cells.