Book contents
- Frontmatter
- Contents
- List of contributors
- Preface
- Part I Assessment and diagnosis
- Part II Psychopathology and special topics
- 6 The psychopathology of children with intellectual disabilities
- 7 Depression, anxiety and adjustment disorders in people with intellectual disabilities
- 8 Schizophrenia spectrum disorders in people with intellectual disabilities
- 9 Personality disorder
- 10 Dementia and mental ill-health in older people with intellectual disabilities
- 11 People with intellectual disabilities who are at risk of offending
- 12 Behavioural phenotypes: growing understandings of psychiatric disorders in individuals with intellectual disabilities
- 13 Mental health problems in people with autism and related disorders
- 14 Self-injurious behaviour
- 15 Mental health and epilepsy among adults with intellectual disabilities
- 16 Neuroimaging and intellectual disabilities
- Part III Treatment and therapeutic interventions
- Part IV Policy and service systems
- Index
- References
8 - Schizophrenia spectrum disorders in people with intellectual disabilities
from Part II - Psychopathology and special topics
Published online by Cambridge University Press: 15 December 2009
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Book contents
- Frontmatter
- Contents
- List of contributors
- Preface
- Part I Assessment and diagnosis
- Part II Psychopathology and special topics
- 6 The psychopathology of children with intellectual disabilities
- 7 Depression, anxiety and adjustment disorders in people with intellectual disabilities
- 8 Schizophrenia spectrum disorders in people with intellectual disabilities
- 9 Personality disorder
- 10 Dementia and mental ill-health in older people with intellectual disabilities
- 11 People with intellectual disabilities who are at risk of offending
- 12 Behavioural phenotypes: growing understandings of psychiatric disorders in individuals with intellectual disabilities
- 13 Mental health problems in people with autism and related disorders
- 14 Self-injurious behaviour
- 15 Mental health and epilepsy among adults with intellectual disabilities
- 16 Neuroimaging and intellectual disabilities
- Part III Treatment and therapeutic interventions
- Part IV Policy and service systems
- Index
- References
Summary
Introduction
This chapter discusses the concept and classification of schizophrenia spectrum disorders, their diagnosis, their relationship to intellectual disabilities (ID), and services appropriate to meet the needs of people with ID who also have psychoses.
It is helpful for those who work with people with ID to have some knowledge of psychoses and their treatment. They will often be better placed than a psychiatrist to communicate with the person concerned and to notice small changes in behaviour or functioning that may indicate the presence of a psychotic disorder. They may also notice benefits from treatment or side effects produced by medication.
Psychosis
Psychosis is a form of mental illness in which contact with reality is lost or seriously impaired. Psychotic disorders are characterized by features such as delusions (false beliefs that are not the result of the person's educational, social or cultural background), hallucinations (perceptions that occur with no external stimulus, such as ‘voices’) and profound changes in mood.
Psychoses are conventionally divided into those for which there is an obvious organic cause (such as delirium related to an infection, or a dementing illness caused by Alzheimer's disease) and ‘functional’ psychoses where an organic cause is not apparent (such as schizophrenia). This distinction between organic and functional psychoses is clinically useful because the symptoms are different, and the treatment of organic psychosis is directed at the underlying cause, whereas the treatment of functional psychoses is directed towards the relief of symptoms.
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- Psychiatric and Behavioural Disorders in Intellectual and Developmental Disabilities , pp. 131 - 142Publisher: Cambridge University PressPrint publication year: 2007
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