|Classification and external resources|
Disorganized schizophrenia, also known as hebephrenia, is a subtype of schizophrenia, as defined in the Diagnostic and Statistical Manual of Mental Disorders, DSM-IV code 295.10.
Disorganized schizophrenia is thought to be an extreme expression of the disorganization syndrome that has been hypothesized to be one aspect of a three-factor model of symptoms in schizophrenia, the other factors being reality distortion (involving delusions and hallucinations) and psychomotor poverty (poverty of speech, lack of spontaneous movement and various aspects of blunting of emotion).
The prominent characteristics of this form are disorganized behavior and speech (see formal thought disorder), including schizophasia and flat or inappropriate emotion and affect. In addition, psychiatrists must rule out any possible sign of catatonic schizophrenia. The condition is also known as hebephrenia, named after the Greek goddess of youth, Hebe, in reference to the typical age of onset in puberty.
A person with disorganized schizophrenia may also experience behavioral disorganization, which may impair his or her ability to carry out daily activities such as showering or eating.
The emotional responses of such people often seem strange or inappropriate. Inappropriate facial responses may be common, and behavior is sometimes described as 'silly', such as inappropriate laughter. Sometimes there is a complete lack of emotion, including anhedonia (the lack of pleasure), and avolition (a lack of motivation). Some of these features are also present in other types of schizophrenia, but they are most prominent in disorganized schizophrenia.
This form of schizophrenia is typically associated with early onset (often between the ages of 15 and 25 years) and is thought to have a poor prognosis because of the rapid development of 'negative' symptoms and decline in social functioning.
See also 
- Schizophrenia DSM
- Liddle PF (August 1987). "The symptoms of chronic schizophrenia. A re-examination of the positive-negative dichotomy". Br J Psychiatry 151 (2): 145–51. doi:10.1192/bjp.151.2.145. PMID 3690102.
- Athanasiadis, Loukas (December 1997). "Greek mythology and medical and psychiatric terminology". The Psychiatrist 21 (12): 781. doi:10.1192/pb.21.12.781.
- How Schizophrenia is diagnosed
- Hebephrenic Schizophrenia Diagnostic Criteria
- American Psychiatric Association (1994). Diagnostic and statistical manual of mental disorders (4th edition). Washington, DC. code 295.10 pp314
- McGlashan TH, Fenton WS (1993). "Subtype progression and pathophysiologic deterioration in early schizophrenia". Schizophr Bull 19 (1): 71–84. doi:10.1093/schbul/19.1.71. PMID 8451614.
- Shimizu E, Imai M, Fujisaki M, et al. (March 2007). "Maintenance electroconvulsive therapy (ECT) for treatment-resistant disorganized schizophrenia". Prog. Neuropsychopharmacol. Biol. Psychiatry 31 (2): 571–3. doi:10.1016/j.pnpbp.2006.11.014. PMID 17187911.