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Schizophrenia and Other Psychotic Disorders: Catatonic | Disorganized | Paranoid | Residual | Undifferentiated

  • At Health - Schizophrenia - This site contains information geared to the clinician as well as the consumer. Information is provided regarding treatment and a possible link to Obsessive Compulsive Disorder.

  • BehaveNet® Clinical Capsule™: Schizophrenia - Schizophrenia, a term introduced by Bleuler, names a persistent, often chronic and usually serious mental disorder affecting a variety of aspects of behavior, thinking, and emotion. Patients with delusions or hallucinations may be described as psychotic. Thinking may be disconnected and illogical. Peculiar behaviors may be associated with social withdrawal and disinterest.

  • eMedicine Health - Schizophrenia - Schizophrenia is a chronic debilitating psychiatric disorder. It is not well understood and probably consists of several separate illnesses. Symptoms include disturbances in thoughts (or cognitions), affects, and perceptions and difficulties in relationships with others.

  • MEDLINEplus Medical Encyclopedia: Schizophrenia - Schizophrenia is a serious brain disorder. It is a disease that makes it difficult for a person to tell the difference between real and unreal experiences, to think logically, to have normal emotional responses to others, and to behave normally in social situations.

  • Psychiatry in Practice - International schizoprhenia resource site, intended for clinicians and health care professionals.

  • Schizophrenia - A group of psychotic disorders characterized by disturbances in thought, perception, affect, behavior, and communication that last longer than 6 months. PsychNet.UK.

  • Schizophrenia - Bilingual English-Spanish Web site about schizophrenia - from causes to treatments.

  • The Merck Manual: Schizophrenia - A common and serious mental disorder characterized by loss of contact with reality (psychosis), hallucinations (false perceptions), delusions (false beliefs), abnormal thinking, flattened affect (restricted range of emotions), diminished motivation, and disturbed work and social functioning.


  • BehaveNet® Clinical Capsule™: Catatonic Schizophrenia - Patients with this subtype of Schizophrenia may exhibit extremes of behavior including catatonia. Some may allow there posture to be rearranged, holding the new position (catalepsy or waxy flexibility). Others may imitate sounds (echolalia) or movements (echopraxia) of others.

  • Catatonic Schizophrenia - No one truly knows what causes catatonic schizophrenia, but it is believed that all subtypes of schizophrenia have the same origin. The neurotransmitter dopamine is believed to play a key part and most anti-psychotic drugs used to treat schizophrenia act on dopamine and its receptors.

  • Catatonic Schizophrenia and the Options for Treatment - Catatonic schizophrenia, benzodiazepines, ECT, conventional neuroleptics, atypical neuroleptics.

  • ICD-10 diagnostic criteria > F20.2 Catatonic Schizophrenia - Prominent psychomotor disturbances are essential and dominant features and may alternate between extremes such as hyperkinesis and stupor, or automatic obedience and negativism. Constrained attitudes and postures may be maintained for long periods. Episodes of violent excitement may be a striking feature of the condition

  • Schizophrenia ( Catatonic Type ) - Definition, causation and treatment.



  • BehaveNet® Clinical Capsule™: Paranoid Schizophrenia - Delusions and auditory hallucinations predominate in patients with this subtype of Schizophrenia while their affective and cognitive functioning remain relatively.

  • ICD-10 diagnostic criteria > F20.0 Paranoid Schizophrenia - This is the commonest type of schizophrenia in most parts of the world. The clinical picture is dominated by relatively stable, often paranoid, delusions, usually accompanied by hallucinations, particularly of the auditory variety, and perceptual disturbances. Disturbances of affect, volition, and speech, and catatonic symptoms, are not prominent.

  • MEDLINEplus Medical Encyclopedia: Schizophrenia, paranoid type - A type of schizophrenia associated with feelings of being persecuted or plotted against. Affected individuals may have grandiose delusions associated with protecting themselves from the perceived plot.

  • PSYweb.com: Schizophrenia ( Paranoid Type ) - A form of schizophrenia that is characterized by a preoccupation of bizarre delusion(s) of being persecuted or harassed. Auditory hallucinations that are related to the delusions' theme.


  • BehaveNet® Clinical Capsule™: Residual Schizophrenia - When there is a history of a prior episode of Schizophrenia and persistence of negative symptoms such as restricted affect or poverty of speech, but delusions, hallucinations, and other positive symptoms no longer dominate this diagnosis applies.

  • ICD-10 diagnostic criteria > F20.5 Residual Schizophrenia - A chronic stage in the development of a schizophrenic disorder in which there has been a clear progression from an early stage (comprising one or more episodes with psychotic symptoms meeting the general criteria for schizophrenia) to a later stage characterized by long-term, though not necessarily irreversible, "negative" symptoms.

  • PSYweb.com: Schizophrenia ( Residual Type ) - A form of schizophrenia that is characterized by a previous diagnoses of schizophrenia, but no longer having any of the prominent psychotic symptoms. There are some remaining symptoms of the disorder however, such as eccentric behavior, emotional blunting, illogical thinking, or social withdrawal.


  • BehaveNet® Clinical Capsule™: Undifferentiated Schizophrenia - This subtype of Schizophrenia applies to patients who fail to meet the criteria for the other subtypes but clearly suffer from this mental disorder.

  • ICD-10 diagnostic criteria > F20.3 Undifferentiated Schizophrenia - Conditions meeting the general diagnostic criteria for schizophrenia but not conforming to any of the above subtypes, or exhibiting the features of more than one of them without a clear predominance of a particular set of diagnostic characteristics. This rubric should be used only for psychotic conditions (i.e. residual schizophrenia and post-schizophrenic depression are excluded) and after an attempt has been made to classify the condition into one of the three preceding categories.

  • PSYweb.com: Schizophrenia ( Undifferentiated Type ) - A form of schizophrenia that is characterized by a number of schizophrenic symptoms such as delusion(s), disorganized behavior, disorganized speech, flat affect, or hallucinations but does not meet the criteria for any other type of schizophrenia.

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Last Modified: Thursday May 20, 2010

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