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Chapter-04 Organic Mental Disorders

BOOK TITLE: Textbook of Postgraduate Psychiatry (2 Volumes)

Author
1. Kalyanasundaram S
2. R Johnson Pradeep
ISBN
9789351529101
DOI
10.5005/jp/books/14227_5
Edition
3/e
Publishing Year
2018
Pages
58
Author Affiliations
1. The Richmond Fellowship Post Graduate College for Psychosocial Rehabilitation, Bengaluru, Karnataka, India
2. St. John’s Medical College Hospital, St. John’s National Institute of Health Sciences, Bengaluru, Karnataka, India, Institutional Ethics Committee (IEC), St John’s Medical College and Hospital, Bengaluru, Karnataka, India
Chapter keywords
Organic mental disorder, delirium, dementia, Alzheimer’s dementia, vascular dementia, Parkinson’s disease, Huntington’s disease, Creutzfeldt-Jakob disease, HIV-associated neurological disease, HAND, normal-pressure hydrocephalus, NPH

Abstract

Organic mental disorders are group of conditions caused directly by abnormalities of the brain structures or by alterations of brain neurochemistry or neurophysiology. They are traditionally called as organic mental disorders or organic brain disorders to distinguish them from the functional disorders such as schizophrenia or depression. This terminology “functional” and “organic” has been removed from most of the classificatory systems since neurodiagnostics and neurobiological evidences have found that every psychiatric condition had a biological component. This chapter covers the history, definition, classification of organic mental disorder, delirium, dementia, comparison of the features of delirium and dementia, Alzheimer’s dementia, vascular dementia, dementia in Parkinson’s disease, Huntington’s disease, Creutzfeldt-Jakob disease, frontotemporal dementias, dementia with Lewy bodies (DLB), neurosyphilis, HIV-associated neurological disease (HAND), normal-pressure hydrocephalus (NPH), Wernicke’s encephalopathy, Korsakoff’s syndrome, transient global amnesia, noncognitive psychopathological manifestations of brain dysfunction, and traumatic brain injury.

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