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This state of affairs cannot be regarded as satisfactory, for they are not truly cases of melancholia, paranoia, dementia praecox or any other described affection. This disease, as its name suggests, is a hallucinatory case, for it is its main feature. These may be of all senses, but auditory hallucinations are the most prominent.
Delusions in Parkinson's disease dementia are less common than in DLB, [152] and persons with Parkinson's disease are typically less caught up in their visual hallucinations than those with DLB. [85] There is a lower incidence of tremor at rest in DLB than in Parkinson's disease, and signs of parkinsonism in DLB are more symmetrical. [ 42 ]
Coded 290.10 in the DSM-IV. 294.8: Dementia NOS: 294.xx: Dementia of the Alzheimer's type, with early onset: Coded 290.xx in the DSM-IV. 290.10: Dementia of the Alzheimer's type, with early onset, uncomplicated: Included only in the DSM-IV. 294.11: Dementia of the Alzheimer's type, with early onset, with behavioral disturbance: Included only in ...
Dementia with Lewy bodies has the primary symptoms of fluctuating cognition, alertness or attention; REM sleep behavior disorder (RBD); one or more of the main features of parkinsonism, not due to medication or stroke; and repeated visual hallucinations. [80] The visual hallucinations in DLB are generally vivid hallucinations of people or ...
Studies show that visual hallucinations are present in 16%–72% of patients with schizophrenia and schizoaffective disorder. [5] [22] [16] [14] In delirium, visual hallucinations have been observed in 27% of patients. [14] [13] Furthermore, visual hallucinations are reported in over 20% of individuals with dementia with Lewy bodies. [14] [23]
Paraphrenia is often associated with a physical change in the brain, such as a tumor, stroke, ventricular enlargement, or neurodegenerative process. [4] Research that reviewed the relationship between organic brain lesions and the development of delusions suggested that "brain lesions which lead to subcortical dysfunction could produce delusions when elaborated by an intact cortex".
The fifth revision of the Diagnostic and Statistical Manual of Mental Disorders gives Lewy body disease as the causative subtype of dementia with Lewy bodies, and Parkinson's disease as the causative subtype of Parkinson's disease dementia. [10] Dementia with Lewy bodies is marked by the presence of Lewy bodies primarily in the cortical regions ...
Posterior cortical atrophy (PCA), also called Benson's syndrome, is a rare form of dementia which is considered a visual variant or an atypical variant of Alzheimer's disease (AD). [ 1 ] [ 2 ] [ 3 ] The disease causes atrophy of the posterior part of the cerebral cortex , resulting in the progressive disruption of complex visual processing . [ 4 ]